St. Martin Island
St. Martin Island: This small coral island about 10km (6mi) south-west of the southern tip of the mainland is a tropical cliché, with beaches fringed with coconut palms and bountiful marine life. There's nothing more strenuous to do here than soak up the rays, but it's a clean and peaceful place without even a mosquito to disrupt your serenity. It's possible to walk around the island in a day because it measures only 8 sq km (3 sq mi), shrinking to about 5 sq km (2 sq mi) during high tide. Most of island's 5500 inhabitants live primarily from fishing, and between October and April fishermen from neighboring areas bring their catch to the island's temporary wholesale market. 3 ships leave Teknaf for St Martin every day and takes around 3 hours.
Getting to St. Martin's is a three-step program. First you'll need to fly or bus it down to Cox's Bazar, and then catch a bus or car to Teknaf, which is right on the very tip of Bangladesh, sandwich up against Myanmar. From Teknaf ships run daily to St. Martin Island . The total distance from Dhaka to the island is 510km (316ml).
Sonadia Island : It is about seven kilometers from Cox's Bazar and about nine square kilometers in area. The western side of the island is sandy and different kinds of shells are found on the beach. Off the northern part of the island, there are beds of window pane oysters. During winter, fishermen set up temporary camps on the island and dry their catches of sea fish.