Martin's Island is a small island in the northeastern part of the Bay of Bengal, about 9 km south of the tip of the Cox's Bazar-Teknaf peninsula, and forming the southernmost part of Bangladesh. It is about 8 km west of the northwest coast of Myanmar, at the mouth of the Naf River. The local name of the island is "Narical Gingira", also spelled "Narikel Jinjira/Jinjera", means 'Coconut Island' in
Bengali. It is the only coral island in Bangladesh. The surrounding coral reef of the island has an extension named Chera Dwip. A small bush is there, which is the only green part of Chera Dwip, enhancing the beauty of this island. People do not live on this part of the island, so it is advisable for the tourists to go there early and come back by afternoon.