Travel and Tourism in Indonesia

Bali: The Island of the Gods

No destination in Indonesia is more famous than Bali, and the island has earned its reputation many times over. Bali is the only Hindu-majority island in Indonesia, a fact that gives it a spiritual atmosphere unlike anywhere else in the archipelago. The island's approximately 4.4 million Balinese Hindus practice a form of religion that blends Hindu theology with Buddhist elements and deep currents of animism and ancestor worship that predate the arrival of Hinduism by thousands of years. The result is a spiritual culture of extraordinary richness and beauty, one that permeates every aspect of daily life.

The most visible expression of Balinese Hinduism is the system of daily offerings called canang sari. Every morning, Balinese women and girls prepare small palm-leaf trays woven into intricate shapes and filled with flowers, rice, incense, and small amounts of food. These offerings are placed at shrines throughout the home, at the entrance to businesses, at the base of significant trees, on temple steps, and at countless other locations. The act of preparing and placing these offerings is not merely a religious obligation but a form of moving meditation, a daily practice of gratitude and spiritual attunement. Walking through any Balinese village in the morning, you will encounter these offerings everywhere, releasing the smell of incense into the warm air.

The temple is the central institution of Balinese religious life. Every village has at least three pura, or temples: the pura puseh or origin temple dedicated to the founding ancestors, the pura desa or village temple at the center of the community, and the pura dalem or death temple at the southern end of the village. Most families have their own house temples, and there are thousands of additional temples dedicated to specific deities, natural features, or historical events scattered across the island. The most sacred of all is Pura Besakih, known as the Mother Temple, which sits on the slopes of Gunung Agung, Bali's highest and most sacred volcano. Besakih is not a single temple but a complex of 23 separate temples spread across the mountain slopes, connected by stairways and pathways. It has been a sacred site for Balinese Hindus for at least a thousand years.

Balinese cremation ceremonies, called ngaben, are among the most spectacular and moving events in the island's ritual calendar. Unlike many world cultures in which death is associated with mourning and solemnity, Balinese cremations are joyful, even festive occasions, as the family celebrates the release of the soul from the body so it may continue its journey toward reincarnation. The body is placed inside an elaborate cremation tower or in the form of a sacred animal, typically a bull for commoners and a mythical winged lion for royalty, and carried to the cremation ground in a colorful procession accompanied by gamelan music and the cheering and jostling of the crowd. The tower is deliberately spun around at crossroads to confuse the spirit of the deceased and prevent it from finding its way back home. At the cremation ground, the tower is set alight in a spectacular blaze, and the ashes are later carried to the sea.

Nyepi, the Balinese Day of Silence and New Year of the Hindu Saka calendar, is one of the most extraordinary observances anywhere in the world. On this day, which typically falls in March, the entire island of Bali shuts down completely. The airport closes. Hotels ask guests to remain indoors or in hotel grounds. The streets are completely empty of traffic. No fires may be lit, no lights turned on, no loud noises made, no work performed. The silence is enforced by village security guards called pecalang who patrol the streets to ensure compliance. Even tourists are expected to observe these restrictions. The day before Nyepi, enormous and elaborately crafted ogoh-ogoh effigies, representations of demonic spirits, are paraded through the streets in a great procession before being burned, symbolically cleansing the world of evil in preparation for the new year. The effect on the night before Nyepi is electrifying, the streets packed with noise and spectacle, making the sudden silence of the following day all the more profound.

Lombok and the Gili Islands

Just east of Bali across the Lombok Strait lies the island of Lombok, a destination that offers many of the natural attractions of Bali at a fraction of the tourist density. Lombok is primarily Muslim, home to the Sasak people, and has a very different cultural atmosphere from its famous neighbor. The island's landscape is dominated by the imposing volcanic cone of Gunung Rinjani, the second highest volcano in Indonesia at 3,726 meters, whose summit is one of the finest trekking destinations in the country.

The Rinjani trek is a serious undertaking, typically requiring two to four days depending on how far you ascend. The standard route leads to the crater rim at approximately 2,700 meters, from which the extraordinary panorama of the caldera becomes visible: a vast bowl containing the turquoise crater lake of Segara Anak, meaning Child of the Sea, at approximately 2,000 meters elevation, with a newer cone called Gunung Baru Jari, the New Child Mountain, rising from the lake. Segara Anak is considered sacred by the Sasak people of Lombok and by Balinese Hindus, who make periodic pilgrimages to the lake to perform ritual offerings. The full ascent to the summit of Rinjani is a more demanding climb, rewarded on clear days by views that encompass Bali, Sumbawa, and the other Lombok Strait islands.

The village of Senaru on Rinjani's northern slopes serves as a popular starting point for the trek and offers a window into traditional Sasak life, with several traditional Sasak villages nearby where visitors can observe the distinctive local architecture of thatched bamboo houses and learn about traditional weaving practices. Sasak women are renowned for their skill in producing hand-woven ikat textiles using traditional backstrap looms, and the villages of Sukarara and Sade near central Lombok are particularly famous for this tradition. The colors and patterns of Sasak ikat, typically featuring geometric motifs on grounds of deep red or brown, are immediately recognizable.

The Gili Islands, a trio of small coral islands off the northwestern coast of Lombok, are among the most popular destinations in Indonesia and have their own very distinct atmosphere. Gili Trawangan, the largest and most northerly of the three, is the party island, famous for its beach clubs, its nightly bar scene, and the absence of motor vehicles, which are replaced by bicycles and horse-drawn carts called cidomos. The waters around all three Gili Islands are excellent for snorkeling and diving, with abundant marine life including several species of turtle that can be reliably encountered just offshore, particularly in the area between Gili Meno and Gili Air. Gili Meno is the most tranquil of the three islands, popular with honeymooners and those seeking genuine quiet. Gili Air, closest to the Lombok mainland, has a slightly more authentic local community alongside its tourism infrastructure and is popular with visitors who want some of Trawangan's beach life with a more relaxed pace.

The south coast of Lombok has emerged as one of the most exciting surf destinations in Indonesia, with a series of powerful reef breaks that rival Bali's. Kuta Lombok, entirely distinct from the Kuta in Bali, is the hub of this emerging surf scene, a small town set beside a sweeping bay with white sand and turquoise water. Selong Belanak, a perfect crescent of white sand further along the coast, offers a gentler wave more suitable for beginners and is arguably one of the most beautiful beaches in Indonesia. The cliffs and headlands of southern Lombok conceal a series of largely undeveloped beaches accessible only by a combination of rough road and boat or foot, rewarding the adventurous traveler with extraordinary solitude.

Komodo National Park

Komodo National Park, inscribed as a UNESCO World Heritage Site in 1991 and voted one of the New Seven Wonders of Nature in 2011, is home to the most extraordinary reptile on earth. The Komodo dragon, Varanus komodoensis, is the largest living lizard, a formidable predator that can reach lengths of three meters and weights of 70 kilograms, and that has survived virtually unchanged since the Pleistocene. The dragon evolved in isolation on the islands of Komodo, Rinca, Gili Motang, and Padar after being separated from its closest relatives by rising sea levels following the last Ice Age. It is a supreme predator, capable of taking prey as large as water buffalo, using its powerful claws, muscular tail, and a saliva laden with both bacteria and venom to weaken and eventually kill animals many times its own weight.

The gateway to Komodo National Park is the town of Labuan Bajo on the western tip of Flores, which has been transformed in recent years from a sleepy fishing village into a significant tourist hub. From Labuan Bajo, boat tours of various lengths set out to explore the park's islands and waters. The most common itinerary involves a day or overnight visit to Komodo Island and Rinca Island to see the dragons, combined with snorkeling or diving at some of the extraordinary marine sites within the park.

Komodo Island, the largest and most famous of the park's islands, has a landscape that would not look out of place in prehistoric times: golden grass-covered hills studded with lontar palms, dry ravines, and open savanna that parches to a golden brown in the dry season. The dragons are genuinely wild animals, not zoo exhibits, and encounters with them can be startling in their immediacy. At the ranger station near the beach, where kitchen scraps have historically been disposed of nearby, dragons are reliably encountered at close range. A ranger guide is mandatory and carries a long forked stick to deter any dragon that gets too close. Elsewhere on the island, trekking through the hills provides opportunities to observe dragons in their more natural habitat, hunting through the undergrowth or basking on open hillsides.

Rinca Island, smaller than Komodo but with a similarly high density of dragons, is often considered by wildlife guides to offer better dragon encounters, as the population here is concentrated near the ranger station and dragons are regularly seen in and around the station buildings themselves, particularly in the morning when they come to warm up in the sun.

Pink Beach, on the northern coast of Komodo Island, is one of only a handful of pink sand beaches in the world. The pink color comes from the mixing of the white coral sand with the pink and red fragments of foraminifera, single-celled marine organisms with distinctive red and pink shells. The beach is beautiful in its own right, and the snorkeling just offshore in the shallow coral gardens is excellent. The waters of Komodo National Park are rich with marine life because of the powerful currents that sweep through the channels between the islands, bringing cold, nutrient-rich water up from the deep ocean and supporting a marine food web of extraordinary productivity. Whale sharks, manta rays, hammerhead sharks, dolphins, and an extraordinary variety of smaller reef fish and invertebrates can all be encountered within the park. The dive sites of Batu Bolong, a seamount rising from the deep water between Komodo and Rinca, and Crystal Rock, a submerged pinnacle, are considered among the finest in Asia.

Flores: The Island of Flowers

Flores, whose Portuguese name means flowers, is one of Indonesia's most rewarding and undervisited destinations, a rugged, mountainous island with a landscape of active volcanoes, traditional villages, dramatic coastline, and a deeply rooted local culture. The island is predominantly Catholic, a legacy of Portuguese missionary activity in the 16th century, which gives it a very different cultural atmosphere from the Muslim islands to the west.

The most famous natural attraction of Flores is Kelimutu, a volcanic complex near the town of Ende in central Flores that contains three small crater lakes of dramatically different colors. The color of each lake changes over time through volcanic activity, but the standard presentation is one greenish lake, one deep turquoise lake, and one dark, almost black lake. The contrast between the three lakes, separated only by narrow rocky ridges, is extraordinary and is believed by local Lio people to be connected to the resting places of the dead, with each lake receiving the souls of a different category of person. Watching the sunrise over Kelimutu from the summit viewpoint, with the colored lakes catching the first light, is one of the most unusual and beautiful natural spectacles in Indonesia.

The traditional Ngada villages of the Bajawa highlands in central Flores are among the best-preserved examples of traditional Indonesian village culture anywhere in the archipelago. The villages of Bena and Wogo sit on the slopes of the active volcano Gunung Inerie and maintain megalithic traditions including the erection of paired male and female stone monuments called ngadhu and bhaga in the center of each clan's compound. These monuments represent the male and female ancestral powers of each clan and are central to the ceremonial life of the community. The architectural style of the Ngada houses, with their elaborately carved facades and high thatched roofs, is distinctive and visually striking. Visitors to these villages are welcomed with genuine warmth and are often invited to see traditional ikat weaving in progress, the women sitting with backstrap looms in the shaded doorways of their houses.

Flores is also one of the great centers of Indonesian weaving tradition. The ikat textiles produced across Flores, each region and village having its own distinctive patterns and color combinations, are among the finest traditional textiles in Indonesia. In the Sikka regency in eastern Flores, the deep blue and burgundy patterns of Sikka ikat are immediately recognizable. In the Ende region, warmer colors and more geometric patterns predominate. In the east of the island, around Maumere and the Larantuka area, different traditions again prevail. These textiles are woven using naturally dyed threads on hand-operated looms, a labor-intensive process that can require months for a single piece of cloth.

The marine environment around Flores is exceptional. The dive sites around Maumere in eastern Flores were considered among the best in Indonesia before a massive earthquake in 1992 destroyed much of the coral and caused significant loss of life in the nearby communities. Recovery has been slow but steady, and the reefs today are growing back. The waters around the Riung 17 Islands, a marine reserve on the north coast of Flores, offer good snorkeling and diving among coral gardens that benefit from the strong tidal flows in this area.

Sumatra: The Great Western Island

Sumatra is a world unto itself, a vast tropical island of extraordinary natural wealth and cultural diversity. It is the sixth largest island in the world, approximately 470,000 square kilometers in area, and contains some of the largest remaining tracts of tropical rainforest in Asia. Within these forests live some of the world's most endangered and magnificent species: the Sumatran tiger, the Sumatran rhinoceros, the Sumatran elephant, and the Sumatran orangutan, as well as the Malayan sun bear, the clouded leopard, and thousands of plant species including the Rafflesia arnoldii, the world's largest individual flower.

The orangutans of Sumatra are the most northerly of the great apes and among the most genetically distinct. The Sumatran orangutan is slightly smaller than its Bornean cousin and has a somewhat different appearance, with a longer, more triangular face and lighter coloring. It is critically endangered, with a population now estimated at fewer than 14,000 individuals, almost entirely restricted to the forests of northern Sumatra. The Gunung Leuser National Park, which together with the Bukit Barisan Selatan National Park and the Kerinci Seblat National Park forms the Tropical Rainforest Heritage of Sumatra UNESCO World Heritage Site, is the primary stronghold of the Sumatran orangutan and also harbors populations of Sumatran tigers, Sumatran rhinoceros, and Sumatran elephants.

The best place in Sumatra to observe orangutans in a semi-wild setting is Bukit Lawang, a small riverside town on the eastern edge of Gunung Leuser National Park in North Sumatra. The orangutan feeding platform here was established in the 1970s as a rehabilitation center for orangutans rescued from captivity, and while the formal rehabilitation program has ended, a population of semi-wild orangutans remains in the forest around the town and can be observed on guided forest walks. These encounters, where a large male orangutan swings through the forest canopy at close range or a mother and infant move along a branch just above your head, are among the most moving wildlife experiences available anywhere in the world. For those who want to observe orangutans in a genuinely wild setting with minimal human habituation, the Leuser ecosystem is very large and good guides can take experienced trekkers into areas where encounters with truly wild animals are possible, though never guaranteed.

Lake Toba, in the highlands of North Sumatra, is one of the natural wonders of the world. It is a supervolcano caldera, the site of the largest volcanic eruption in the last 25 million years, the Toba catastrophe of approximately 74,000 years ago. The eruption was so enormous that it may have caused a global volcanic winter that lasted for years and dramatically reduced the human population of the planet at the time. Today, the caldera is filled with a beautiful lake 100 kilometers long and 30 kilometers wide, 506 meters at its deepest, making it the largest volcanic lake in the world and the largest lake in Southeast Asia. Rising from the center of the lake is Samosir Island, itself larger than Singapore, which has become the cultural heartland of the Batak people.

The Batak people are one of the most culturally distinctive groups in Indonesia, known for their powerful vocal music, their elaborate weaving tradition producing richly patterned ulos cloth, their distinctive architectural style featuring large clan houses with dramatically curved and pointed rooflines, and historically for a tradition of ritual cannibalism that European missionaries and colonial administrators found simultaneously horrifying and fascinating. Today the Batak are predominantly Christian, and their churches on Samosir Island and around the shores of Lake Toba ring on Sunday mornings with extraordinarily powerful choral singing that reflects both traditional Batak musical tradition and the European Protestant hymn tradition introduced by missionaries in the 19th century. The lakeside town of Tuktuk on Samosir is the main tourist hub, with guesthouses, restaurants, and shops catering to visitors who come to experience the lake, explore traditional Batak culture, and enjoy the pleasantly cool highland climate.

Bukittinggi, in the highlands of West Sumatra, is the cultural capital of the Minangkabau people, one of the most fascinating and unusual of Indonesia's many ethnic groups. The Minangkabau practice a form of matrilineal social organization that is unique among the world's Muslim peoples, in which clan membership, property, and family names pass through the female line. The characteristic Minangkabau architecture, with its dramatically curved rooflines sweeping upward at both ends like buffalo horns, is immediately recognizable and gives the culture its most visible symbol. The name Minangkabau itself means victorious buffalo and refers to a legendary contest in which the Minangkabau outwitted a rival kingdom by substituting a baby buffalo for the expected adult animal in a buffalo fight, the baby being fitted with sharpened iron blades on its horns and left hungry so that it would seek the opponent's buffalo's milk and gore it fatally in the process.

Bukittinggi itself is a lively market town set at 930 meters elevation among dramatic volcanic peaks. The Jam Gadang, or Big Clock, tower in the center of town is the city's landmark, built by the Dutch in 1926 and topped with a distinctive curved Minangkabau roof added after independence. The Sianok Canyon, a dramatic cleft in the earth's surface immediately adjacent to the town center, plunges 100 meters to a green valley below and was used by the Japanese occupiers during World War II as the site of a network of tunnels, now open to visitors as a museum. The surrounding highlands contain several excellent examples of traditional Minangkabau architecture, particularly the royal palace of Pagaruyung, a reconstruction of the original palace that burned down in 2007, which gives a good sense of the elaborate painted and carved decoration of traditional Minangkabau royal buildings.

Padang, the capital of West Sumatra province and the largest city in Sumatra outside of Medan, has given its name to one of the most famous culinary traditions in the world. Padang food, or masakan Padang, is characterized by its rich, intensely spiced dishes cooked in coconut milk and frequently with generous quantities of fresh and dried chilies. The Padang restaurant is one of the great institutions of Indonesian urban life: you enter, sit down, and within moments the table is covered with small dishes of various preparations, from which you choose what you want to eat and pay only for what you consume. The dishes are displayed at room temperature in the restaurant window or on shelves, a tradition that evolved in the days before refrigeration as a way of displaying the day's offerings to passing customers.

The most famous dish of Padang cuisine, and arguably of all Indonesian cuisine, is rendang, a slow-cooked preparation of beef in coconut milk with an extraordinarily complex spice paste including chili, galangal, lemongrass, ginger, turmeric, and many other aromatics. The cooking process can take several hours, during which the liquid gradually evaporates until the meat is surrounded by a dark, intensely aromatic coating of concentrated spice and coconut. The result is a dish of remarkable depth and complexity, simultaneously spicy, rich, aromatic, and slightly sweet. Rendang was voted the number one most delicious food in the world in a CNN survey of world cuisine and has become one of the most recognized Indonesian dishes internationally.

Sulawesi: The Orchid Island

Sulawesi, the world's eleventh largest island, occupies a unique position in the Indonesian archipelago both geographically and culturally. Its peculiar shape, four peninsulas radiating from a central highland mass, is the result of the collision of several distinct geological terranes, and the resulting complexity of its topography and environment has produced levels of biodiversity found nowhere else on earth. Many of Sulawesi's species are endemic, meaning they are found nowhere else in the world, including the babirusa, a pig with tusks that grow upward through the snout, the anoa, a miniature buffalo, and a spectacular array of endemic bird species.

The Torajaland highlands of central Sulawesi, known as Tana Toraja, are home to one of the most fascinating and original cultures in Indonesia. The Toraja people, numbering perhaps half a million, are known throughout the world for their elaborate death ceremonies, which are among the most spectacular ritual events anywhere in Southeast Asia. For the Toraja, death is not an end but a transition, and the proper conduct of funeral ceremonies is the most important religious and social obligation a family can fulfill. These ceremonies can last for days or even weeks, involving the sacrifice of large numbers of buffalo and pigs, the erection of temporary ceremonial structures, the gathering of hundreds or thousands of relatives and guests, traditional dancing and singing, and the procession of the deceased in an elaborately decorated coffin or effigy.

The most distinctive element of Toraja funerary tradition is the tau-tau, a life-sized effigy of the deceased carved from wood and dressed in the person's clothes, which is placed in a balcony carved into the cliff face above the burial cave where the actual remains are interred. These cliff graves, found throughout the Tana Toraja highlands in locations such as Lemo and Londa, are among the most visually striking burial sites in the world. The rows of tau-tau figures, some centuries old and weathered to a spectral grayness, others recent additions dressed in bright modern clothing, gaze out across the valleys with an expression that seems simultaneously to reach into the past and confront the visitor's present.

The tongkonan, the traditional Toraja clan house, is immediately recognizable by its dramatic boat-shaped roof that sweeps up at both ends in a dramatic upcurved arc, somewhat reminiscent of Minangkabau architecture but even more extreme. The roofs are traditionally made of bamboo shingles and painted with elaborate geometric patterns in red, black, white, and yellow, the colors each carrying specific symbolic meanings. The tongkonan is not simply a house but the ceremonial center of the clan, the site where offerings are made to the ancestors and where family ceremonies are conducted. Facing each tongkonan across a ceremonial ground is a rice granary called alang, which has a similar but inverted roof form and represents the prosperity and abundance of the family.

Bunaken National Park, in the waters of the Celebes Sea off the northern tip of Sulawesi's northern peninsula near the city of Manado, is one of Indonesia's most celebrated marine protected areas. The park encompasses a series of islands surrounded by dramatic wall dives, where the reef drops vertically from the surface to depths of 500 meters and beyond. The walls are encrusted with enormous varieties of soft and hard corals and sponges and support an extraordinary abundance of marine life, from the largest marine species such as whale sharks and manta rays to the most minute creatures that can only be seen with a magnifying glass. Napoleon wrasse, bumphead parrotfish, and large schools of barracuda and trevally are among the signature species of the Bunaken walls. The visibility in these waters can exceed 40 meters, and the variety of life encountered on a single dive is breathtaking.

The Maluku Islands: The Original Spice Islands

The Maluku Islands, known to history as the Spice Islands, are among the most historically consequential places on earth. The nutmeg trees of the Banda Islands and the clove trees of the northern Moluccas triggered a global trade revolution in the 15th and 16th centuries that reshaped the world economy, launched the age of European exploration and colonialism, and ultimately contributed to the modern world order in ways that reverberate to this day. Today, these islands are remote, beautiful, and visited by relatively few travelers, but they reward the adventurous visitor with extraordinary history, spectacular marine environments, and a sense of standing at the center of a world that once held the entire globe in thrall.

The Banda Islands, a tiny archipelago of ten small volcanic islands in the Banda Sea, are the specific source of the world's nutmeg trade. The nutmeg tree, Myristica fragrans, produces both nutmeg from its seed and mace from the red aril surrounding the seed, two spices that were used throughout medieval Europe and the Middle East as medicines, food preservatives, and flavorings. In the pre-refrigeration world, where the ability to mask the taste and smell of meat that was beginning to turn was literally a matter of life and death, and where medical tradition attributed near-magical health properties to nutmeg, these spices commanded prices that in medieval markets could make a man wealthy for life with a handful of seeds.

The Dutch colonial presence in the Banda Islands is visible in a remarkable collection of surviving colonial architecture. The fortified walls of Fort Belgica on Banda Neira Island, built in the 1610s, are among the best-preserved examples of early VOC fortifications anywhere in Indonesia, and climbing to the highest point of the fort offers a view over the Banda Sea and the surrounding islands that must have been intoxicating to the men who built it. The nutmeg plantations established by the Dutch after their massacre of the Bandanese people in 1621 still exist, worked now by descendants of the enslaved laborers and colonial settlers brought to replace the original population. The nutmeg trees themselves grow around the old plantation houses, their fruits hanging like pale green tennis balls from the branches, the red mace visible as the fruit ripens and splits open.

The underwater world of the Banda Sea is extraordinary. The very deep, cold, nutrient-rich waters of the Banda Sea support an incredible abundance of pelagic life, and the reefs around the Banda Islands, while not as well-known as those of Raja Ampat or Komodo, are in excellent condition and teeming with species. Large pelagic fish including yellowfin tuna, marlin, and various shark species can be encountered in the open water, and the reef dives offer all the diversity of the Coral Triangle.

Nature and Biodiversity: Indonesia's Green Heritage

Indonesia's role as one of the world's great reservoirs of biodiversity cannot be overstated. The country covers only 1.3 percent of the earth's land surface but contains approximately 10 percent of the world's flowering plant species, 12 percent of all mammal species, 17 percent of all bird species, and 16 percent of all reptile and amphibian species. It is a biodiversity hotspot of the highest order, a consequence of its position at the intersection of two major biogeographic realms, the Indo-Malayan to the west and the Australasian to the east.

The Wallace Line, the biogeographic boundary first identified by the Victorian naturalist Alfred Russel Wallace during his years of collecting in the archipelago between 1854 and 1862, remains one of the most significant boundaries in natural history. Wallace noticed that the animals on either side of the narrow strait between Bali and Lombok were distinctly different: on the Bali side, typically Asian species such as tigers, rhinoceros, and Asian birds; on the Lombok side, the distinctly Australian forms of marsupials, cockatoos, and other characteristically Australasian species. The boundary runs roughly between Bali and Lombok and between Borneo and Sulawesi, though subsequent research has shown that the transition is more complex and gradual than a simple line might suggest. The area between the sharp Wallace Line and the further east Lydekker's Line is known as Wallacea and contains many endemic species that evolved in this transitional zone.

The Sumatran tiger, the smallest of the surviving tiger subspecies, is critically endangered with a wild population estimated at fewer than 400 individuals, all confined to the increasingly fragmented forests of Sumatra. The primary threats are habitat loss from deforestation for palm oil plantations and other agricultural uses, and poaching for the illegal wildlife trade in which tiger parts command high prices in markets throughout Asia. The Sumatran rhinoceros, the smallest and most ancient-looking of all rhino species with its distinctive hairy appearance, is even more critically endangered, with fewer than 80 individuals believed to remain in the wild, scattered in small groups in Sumatra and a remnant population in Borneo. Conservation efforts for both species are ongoing but face severe challenges from the continuing expansion of palm oil agriculture.

Palm oil is the great environmental crisis of the Indonesian archipelago. Indonesia is the world's largest producer of palm oil, a vegetable oil used in an extraordinary range of food products, cosmetics, and biofuels, and the expansion of oil palm plantations has been one of the primary drivers of rainforest destruction in Sumatra and Kalimantan over the past several decades. The clearing of peat swamp forests in particular releases enormous quantities of stored carbon and is a major contributor to climate change, in addition to destroying habitat for orangutans, elephants, tigers, and thousands of other species. The use of fire to clear land, illegal but widespread, produces the toxic haze that has become a regular feature of life in Singapore, Malaysia, and parts of Sumatra during dry seasons. Indonesia has adopted policies intended to slow deforestation and protect remaining high-conservation-value forests, with some measurable success in recent years, but the challenge remains formidable.

The coral reefs and marine ecosystems of Indonesia are under similar pressure. Destructive fishing practices including the use of cyanide and explosives, overfishing of key reef species, coral bleaching driven by rising sea temperatures from climate change, and pollution from coastal development all pose significant threats to Indonesia's marine biodiversity. Marine protected areas like Komodo National Park, Bunaken, and Raja Ampat have demonstrated that protection can allow ecosystems to recover and maintain their extraordinary biodiversity, and community-based conservation programs in Raja Ampat in particular have demonstrated the power of local ownership of conservation as a strategy for sustainable marine management.

Ten UNESCO World Heritage Sites

Indonesia has ten UNESCO World Heritage Sites, a figure that reflects both the extraordinary richness of its natural and cultural heritage and the relatively early stage of its engagement with the UNESCO heritage program. Many experts believe that Indonesia has dozens of additional sites that would qualify for inscription if nominated.

Borobudur Temple Compounds was inscribed in 1991, recognizing the world's largest Buddhist monument as an outstanding example of human creative genius and a unique artistic achievement. Prambanan Temple Compounds was also inscribed in 1991. The Komodo National Park was inscribed in the same year for its outstanding natural values, including the Komodo dragon and its marine environment. The Tropical Rainforest Heritage of Sumatra, encompassing three national parks in Sumatra, was inscribed in 2004 and recognized as one of the world's most important forest conservation areas. Bali and its Cultural Landscape, recognized specifically for the subak irrigation system and its associated rice terraces and water temples, was inscribed in 2012. Sangiran Early Man Site in Central Java, the fossil site that has yielded more Homo erectus remains than any other location in the world, was inscribed in 1996. Sawu Sea National Marine Park and the Banda Islands were inscribed more recently, with Ombilin Coal Mining Heritage Site of Sawahlunto in West Sumatra inscribed in 2019. The Cosmological Axis of Yogyakarta and its Historic Landmarks, inscribed in 2023, is an extraordinary serial cultural site encompassing the philosophical and physical axis connecting the Palace of the Sultan of Yogyakarta (Kraton), the volcanic peak of Mount Merapi to the north, and the Southern Sea (Indian Ocean) to the south, along with the ceremonial public space known as the Alun-Alun, the Grand Mosque (Masjid Gedhe Kauman), the Taman Sari water palace, and associated historic districts. The site reflects the Javanese cosmological worldview known as sumbu kosmologi, in which the Sultan acts as mediator between the spiritual and earthly realms, with the axis of the cosmos running directly through the royal palace. This inscription added official UNESCO recognition to Yogyakarta's unique synthesis of Hindu-Buddhist, Islamic, and Javanese spiritual and political traditions.