The central area is the mountain that matters is Phu Khao Phanom bencha in Phuket range, rest in the North - South. The highest peak is a mountain in the Phuket range is high. 1,400 meters, is the watershed in West, flowing into the Phang Nga Bay in the East. It flows into the Indus River north, flowing into the hatred in the area of Surat Thani province.