Pangkalanbun is the capital of the Kotawaringin Barat regency, in the western part of Central Kalimantan. Make sure to visit the old Palace of Pangkalabuan, constructed completely out of ulin (ironwood). It is the only Banjar royal legacy found in Central Kalimantan. The Mosque of Kyai Gede is more than 300 years old. Tanjung Puting National Park is a well-known nature and wildlife reserves in the lowland and swamp forests, inhabited by orang utans, owa-owa, bekantan and other primates. One can visit the Orang Utan Rehabilitation Center, which is supported by the World Wildlife Fund (WWF).