It is a mountainous island, with Khao Salak Phet being the highest peak at 744 metres. The island is known for several waterfalls,and rainforests.
The main settlements on the west coast are around Sai Khao, Hat Kai Mook, Hat Kai Bae, Ban Klong Prao and the fishing village of Bang Bao on the south coast. The Island's administrative centre is Ban Dan Mai on the east coast.