Sulawesi straddles one of the most important biogeographical boundaries on Earth. The Wallace Line, named for the naturalist Alfred Russel Wallace, marks the transition between Asian and Australian fauna, and Sulawesi sits squarely in the mixing zone. The result is an island of evolutionary oddities: creatures that evolved in isolation after the landmass rifted away from its neighbors millions of years ago. Gandang Dewata National Park protects a remarkable concentration of these endemic species. Research by the Indonesian Institute of Sciences (LIPI) in 2013 documented the park as habitat for numerous endemic bird species and identified several species entirely new to science. A broader 2016 survey recorded 417 bird species within the park, 116 of them endemic to Sulawesi. The anoa, a dwarf buffalo found nowhere else, browses the understory. The babirusa, a tusked pig whose name translates to pig-deer, roots through the forest floor. Tarsiers cling to branches with oversized eyes adapted to the perpetual twilight beneath the canopy.

Tanete Gandangdewata is the highest peak in the Quarles Range, the mountain spine that runs through western Sulawesi. The main summit reaches 3,074 meters; a northern sub-peak stands at 3,037 meters, and the southern at 2,966. Northeast of the main summit, Puncak Mistis -- the Mystical Peak -- rises to 3,037 meters, a name earned by the clouds that envelop it for most of the year. Two multi-day routes lead to the top, both demanding. The terrain climbs through lowland rainforest, transitions to moss-draped montane forest, and finally breaks into the stunted vegetation of the alpine zone, where the drum-shaped summit stone sits amid wind-scoured rock. In 2017, five climbers from Bandung had to be evacuated from the mountain after succumbing to exhaustion and hypothermia -- a reminder that despite its proximity to the equator, Gandang Dewata's altitude creates conditions that can turn lethal.

The park's lower elevations are laced with waterfalls that cascade down from the Quarles Range's steep western slopes. Bata, Buttuada, and Samababo are the most accessible, each tumbling through gaps in the forest where sunlight reaches the water for a few hours each day. Hernon Hill and Mambuliling Peak offer vantage points across the park's interior, and Talepom Bulam Peak opens views eastward toward the central Sulawesi highlands. Infrastructure remains minimal. There are no paved roads into the park's core, no visitor centers, no marked trails in the Western sense. Access runs through the Mamasa Regency, a district where a significant number of villages still lack electricity and the economy rests on subsistence farming, cocoa, and palm oil. The park's remoteness is both its vulnerability and its protection: what keeps tourists away also keeps loggers and poachers at a distance.

Beneath the forest that conservationists are working to protect lies a different kind of resource. The mountains of West Sulawesi contain deposits of nickel, thorium, and uranium, and radiation surveys have detected levels significant enough to warrant further investigation. The tension is familiar across Indonesia: a young national park, barely a decade old, sitting atop mineral wealth in a province where above-average economic growth has not yet translated into broad prosperity. The Mamasa people, whose language gave the mountain its name, practice subsistence agriculture on the surrounding slopes. Cocoa and palm oil plantations press against the park's boundaries. For now, the designation holds. The 2016 declaration by the Indonesian Ministry of Environment and Forestry recognized what LIPI's scientists had argued: that Gandang Dewata's biodiversity, much of it still uncatalogued, is irreplaceable.

Gandang Dewata remains one of Indonesia's least-visited national parks, overshadowed by Komodo and Bromo-Tengger-Semeru and the other parks that appear on tourist itineraries. No international flights land in Mamasa. The journey from Makassar requires hours of driving on mountain roads that dissolve in the rainy season. But the obscurity means something survives here that has vanished from more accessible places: pristine Wallacean forest, undisturbed by the pressures that have fragmented habitat across the rest of Sulawesi. Researchers continue to find species previously unknown to science. In 2024, a team confirmed the presence of Paucidentomys vermidax, a rare endemic shrew-rat so infrequently observed that its very existence was uncertain. The mountain keeps its secrets grudgingly, revealing them only to those willing to make the climb. And somewhere on the summit, when conditions align, the Mamasa say you can still hear it -- the echo of a drum that no human hand has struck.