My wife and I have been to Thailand before and we went snorkeling at Phi Phi and at Koh Tao. We are thinking about maybe going back to Thailand next year and I would like to hear from other people where they have found the best snorkeling in Thailand. After being to places like Perhentian Island in Malaysia and the Maldives (see http://gardkarlsen.com/sun_island_index.htm ) we have become a bit spoilt i guess. But I guess there are places in Thailand that can match these places