The island of Kalimantan or Borneo is said as the third biggest island in the world after Greenland and Papua. Kalimantan or Borneo island with total size around 746.540 square km, a 532.400 square km is belong to Indonesian region. The whole area is divided into 3 countries, Malaysia, Brunai Darussalam, and Indonesia. The original resident of Borneo is the Dayak which is considered as distinct ethnic group. Indonesian part of Kalimantan or Borneo is divided into 4 provinces; West Kalimantan which capital city at Pontianak, Central Kalimantan at Palangkaraya, South Kalimantan at Banjarmasin and East Kalimantan at Samarinda. On our writing here we try to give short information on one of the province that is Central Kalimantan or Borneo. Central Kalimantan has become important place due to it's national park protecting the habitat of orangutans. Central Kalimantan has the size 152.600 square km, and is one of Indonesian area with smallest population density. Beside the Dayak there are other small ethnic groups also settle in Central Kalimantan such as Java, Madura, Bali, Chinese, Makassar. Based on area of living and vague characteristic of the Dayak in Central Kalimantan or Borneo there are many group or it might be said sub-ethnic group of Ngaju, Ot Danum, Ma'nyan, Ot siang, Lawangan, Katingan and others. They live along the bank of rivers such as Barito, Kapuas, Kahayan, Katingan, Mentaya, Seruyan, Kurnai, Arut, Jelai and others. Deep in the beginning of big rivers such as Barito and Mahakam, 2 longest rivers are still sub-ethnic groups living in nomaden, and totally do not enjoy the influence of more settled population such as Ot Olang-Olang and Penyawang. Ot is a name for the groups of Dayak living deep in the beginning of the 2 rivers Ot Dayak still divided into smaller groups such as the Punan, Ot Sinuw, Ot Muntai, Ot Paridan, Ot Saribas. Central Kalimantan province administratively divided into 6 Kabupatens or second level government. These Kabupatens are Palangkaraya, Kapuas, Barito Utara, Barito Selatan, Kota Waringin Barat and Kota Waringin Timur. The type of settlement as a bit mentioned above is along the river bank. A unit of settlement can consist between 100 to 500 resident. Their village we call for their smallest settlement unit has a road parallel or perpetual with the river. In the past their house were made in one construction above wood poles like stilt, having 50 small rooms where various families living, close families or far relatives. To borrow the terminology of ethnography, it is called the pattern of settlement based on small ambilineal or minimal lineage. This kind of house had 5 to 7 meters height from the land surface. Among Ot Danum Dayak it is called Betang, and by Ma'nyan Dayak it is called Lewu. Today only in the area of Ot Danum deep in Kahayan river which still can be seen betang or Lewu. Most important for us here is the Kapupaten Waringin Barad which has the border with West Kalimantan and South Beach. Here is preserve the most famous National park called Tanjung Puting. The specialty of Tanjung Puting National Park is because the habitat of rare endangered animal of orangutans. In the world until now is known only 3 places as the habitat of this hominid called orangutans. The name of orangutans is taken from Indonesian language; orang means human, utan (hutan) mean forest. Now this word become the nickname of the hominid. Tanjung Puting National Park has been continuously endangered by the great fire and illegal lodging. The biggest fire was in 1998 which burn a large part of the forest. This accident indeed made every one in the world put a great concern on inability of Indonesian government in managing the area. Besides the existence of orangutans has been dangered from it's habitat, it is also subject to illegal capturing and snuggling, as many illegal vendors get personal profit from this practice. Foreign and domestic foundations have been working hand by hand to save the orangutans. A great effort has been done such as physical researches to preserve the population of orangutans. This effort has born further project of rehabilitation of those orangutans previously looked after by human being. National laws has been put to force the effort of the rehabilitation, protection and education of the orangutans important to the nature. Two places in Tanjung Puting National Park have been built as the rehabilitation centers of orangutans that are Orangutans rehabilitation centers at Camp Leakey and orangutans rehabilitation center at Tanjung Harapan. Orangutans rehabilitation center at Tanjung Harapan is specially built for young orangutans or called the orphan orangutans. The effort of rehabilitating the life of orangutans in Tanjung Harapan and Camp Leakey has attracted many visitors to know more closely the orangutans itself and it's habitat. Organized tours to Camp Leakey has been started since 1970s with minimum travel facilities. Tour program to Camp Leakey has been better since 1980s when Pangkalan  Bun town has been decided as the base for Indonesian air force for Kalimantan so bigger airport was constructed compared to just landing stripe. To visit Camp Leakey and Tanjung Harapan one has to drop off at Pangkalan Bun  by air or by ferry boat. By Air cab be  from Semarang, the capital city of central Java, Surabaya the capital city of East Java, and from Banjarmasin South of Kalimantan. To reach Banjarmasin from any other cities of Indonesia is much more easier, yet the distance will be far much longer, compared to from Semarang or Surabaya. From Pangkalan Bun town one has to hire a local traditional motorized boat called Klotok and cruise along the river of Sekonyer. Visiting Camp Leakey is not only see orangutans, but one can also by chance to see Wawa (small monkeys with long legs), Proboscis monkeys, and various birds.  A minimum of 2 night trip counted from Pangkalan Bun and finish at Pangkalan Bun is needed to visit Camp Leakey and Tanjung Harapan a combination of visiting orangutans, the Dayak traditional house, traditional gold mining can be organized. Kalimantan is still a vast land to explore, it has vast tropical forest great rivers and specific ethnic group, the Dayak