The Nyaru Menteng centre, about 30 km north of Palangka Raya, is run by the Borneo Orangutan Survival Foundation and is the largest primate rehabilitation operation in the world. Rescued orphans are housed, taught forest survival skills, and eventually released into protected reserves further into Kalimantan.
The centre itself is closed to general visitors — keeping outside contact away from the apes is essential for their reintroduction. A small visitor area allows you to learn about the work and to support it. Several local operators arrange combined trips that also visit a release-monitoring area.