Few places suggest wild, untamed adventure like Borneo. One of the most ecologically diverse places on earth, Borneo is home to orangutans, exotic birds, Sumatran rhinos, pygmy elephants, and an array of other creatures. In Kalimantan, in Indonesian Borneo, you can travel down the Kapuas River, the longest in Indonesia; visit villages of the indigenous Dayak people; and observe foreign influences from China, Malaysia, and even Europe in the ports and cities along the way. You can also go trekking in the rainforest for a chance to see some of Borneo's famed wildlife in person. Bukit Baka-Bukit Raya National Park is a conservation area in West Kalimantan that includes two of the highest mountains in Borneo and supports wildlife such as orangutans, clouded leopards, slow lorises, sun bears, and many other species.