Listed as one of the ten best dive sites on the earth, the Similan Islands are the best diving Thailand has to offer. The most important of all dive sites in the Similans is Richelieu Rock, famous for its incomparable variety and abundance of marine life. Whale shark sightings are common here. The Similans have the greatest diversity of marine life in Thailand.
One of the best things about taking a liveaboard cruise in Burma’s Mergui archipelago is that you will hardly encounter another boat but will instead have dive sites to yourself. This makes a pleasant change to divers used to the busier reefs in neighboring Thailand.