African Queen meets jungle safari in this ever-popular national park in southern Kalimantan, where you can not only get up close and personal with Asia's largest ape, the orangutan, but also cruise the jungle in high style aboard your own private houseboat. The typically three-day journey takes you on a round trip up the Sungai Sekonyer to Camp Leakey, with stops at several orangutan feeding stations and plenty of impromptu wildlife spotting. Despite its creature comforts, the experience still manages to be authentic adventure travel, and is open to anyone.