Koh Lanta is an island off the Andaman coast in Southern Thailand. It is popular with holidaymakers who come to enjoy the sandy beaches and snorkeling in the clear blue sea. There are in fact 52 islands in this area with Koh Lanta Yai being the biggest. Along the west coast, which is 25 kilometers long, there are nine beaches. Tourists can come here by boat from Krabi or other islands like Koh Phi Phi.