Those who love adventures, must not miss this Orang Utan trip.  You start your journey from Pangkalan Bun airport - crossing Kumai & Seikonyer river, you may find the Proboscis monkeys along the riverbanks - the endemic animal that can be seen only in Borneo.  Proceed upstream into PONDOK TANGGUI, the second rehabilitation center where you may enjoy many babies and juveniles at feeding area around 9 am.