Located in the northwest of Chao Mai National Park in the area of Ko Libong subdistrict, this island is about 9 kilometers from Kuantan Guku Pier. It is the third largest island in Trang Province. The majority of the landscape features high cliffs, attracting many visitors who come to see the Emerald Cave. To reach the cave, travelers must take a long-tail boat operated by locals, navigating around to the back side of the island before swimming and snorkeling through the entrance.