Koh Man Nai is one of the islands in the Mun Islands with a total of 3 islands, named after the distance from the shore. The island closest to the coast is called Koh Mun Nai. It is an island with an area of ​​approximately 209,600 square meters. There are bunch of scenic bays, such as Ao Ton Makham, Ao Hin Khot Ya, Ao Gonggang and especially Ao Na Ban which has the beautiful coral reefs.