SCUBA DIVING Thailand is an exceptional destination for scuba divers and snorkellers, with dives sites stretching along Thailand's east coast and around Samui island, but the world-class dive sites are in the Andaman Sea. off the -coast of Phuket: Similans, Surin Islands, Phi Phi lsland, Richilieu Rock. On the other side of the peninsula in the Gulf of Thailand is the Ang Thong' Island National Marine Park, a group of more than 40 beautiful islands off the west of Surat Thani province and near Ko Samui. And also in Pattaya, scuba divers can organize daily trips from the resort to the offshore islands of Ko Lan, Ko Sak, and Ko Krok.