Tanjung Puting National Park

Home to Camp Leakey, the orangutan research and rehabilitation site founded by Birutė Galdikas in 1971 and still active today — one of the longest-running great ape studies anywhere in the world. Reaching the park means flying into Pangkalan Bun and driving to the river town of Kumai, since the park itself is accessible only by water from there. Multi-day safaris aboard traditional wooden klotok houseboats, sleeping on deck under mosquito nets, travel blackwater rivers through peat swamp forest between feeding stations — Camp Leakey and Pondok Tanggui among them — making this one of the most immersive and reliably productive orangutan-watching trips anywhere in Borneo.