A small island in the area of Ko Tarutao National Park between Ko Tarutao and Mu Ko Adang. It is possible to travel to the island, but the Park does not allow overnight stays. Ko Khai has clean, sandy beaches with soft white sand that is soft on the feet. The beautiful clear blue water level is according to the depth. Around the island are coral reefs, and on the island, there is a natural stone arch, which is considered the symbol of Tarutao National Park.