Day. 01 Airport – Kumai – Proboscis Tour –Houseboat (L, D). On arrival at Pangkalan Bun airport, meeting service then transfer to Kumai, seaport and the gate to reach National Park. Onboard, crossing Kumai river in approximately 15 minutes to reach Seikonyer river, the min river in National Park. Lunch will be served on boat by our own cook. We are riding on the boat about 2 hours to reach National Park. At 16.30 we continue our tour to observe Proboscis monkeys along the riverbanks. Proboscis monkeys are being the endemic animal that can be seen only in Borneo. Dinner and Overnight on the boat.