The marine life in the Andaman Sea ranges from manta rays to whale sharks. The visibility is as clear and translucent as a glass jar. It may come as no surprise then, that some of the best snorkelling and diving sites in the world are found here, including along the coasts of the Surin Islands. Located in the Tha province of Phang Nga, this stretch of islands are some of the most remote, being some 37 miles from the west coast of Thailand. Because it is so far from the mainland, tourists are less likely to visit, making it both remote and unspoiled by visitors. In addition to marine animals, divers here will also find that the reef is vast and seemingly untouched, with diverse coral throughout. This is largely due to the fact that the islands, as part of a UNESCO development, have been a Marine National Park since 1981. One of the most famous diving sites, Richelieu Rock, is found here as well. Divers are almost guaranteed to spot a whale shark, especially during the months of February to April.