Lake Rana Tonjong is located in Nanga Mbeling village, Sambi Rampas district, some 3 kilometer north of Pota. The lake spans 2,200 square kilometers and lies in low plains surrounded by hills in the west, north and south and paddy fields in the east. The whole lake is covered by the giant lotus (Victoria Amazonica), which bloom once a year from April to May. The lotus are endemic to the area.
This place can be reach by car from Ruteng for about 4 hours, can stay overnight in Pota at Teratai guest house.