Koh Samui, the island of the coconut trees is the third largest island in Thailand. The area is 247kms. It is located 700kms south of Bangkok. The most well-known beaches are Chaweng, Lamai, Bophut, Big Buddha and Maenam. Samui has many sister islands. Well known are Koh Tao (one of the best diving islands in Asia) and Koh Phangan.