The beautiful Islands of Koh Bon and Koh Tachai are a part of the Surin National Marine Park. Due to their isolated location these islands offer excellent opportunities to see mantas and whale sharks.

Koh Tachai is a series of submerged pinnacles and boulders which form excellent swim throughs. A variety of sea fans, feather stars and anemones make this a stunning diving area. Huge Napoleon wrasse and yellow tail barracudas are often spotted amidst schools of bannerfish and fusiliers.

Koh Bon is an amazing dive spot, famous primarily for its visiting whale sharks, manta rays and sharks. There are thousands of schooling fish, octopus and cuttlefish. A myriad of corals, anemones and fascinating sea sponges make this an exceptional dive spot teeming with life.