Similians Islands:

Similan islands offer crystal clear waters and a spectacular marine life and therefore it is no surprise that the best scuba diving liveaboard cruises and daytrips take part in this area.
The Similan islands are a marine national park and consist of 11 islands and are located off the west coast of Thailand, 70 km west of Khao Lak.
The eastern Similan islands eastern coast offer sloping coral reefs where there west coast consists off huge granite boulders with amazing swim-through.
The Similan marine national park is open from the 15th October until the 15th May every year and is the most popular scuba diving destination in Thailand.