Angthong National Marine Park Tour By Ferry Boat Daily Snorkeling-Kayaking-Sighseeing Angthong National Marine Park by HighSeaTour with Big Boat, Save, Convenience and Safety Adult THB 1,200 net / Child THB 800 net Angthong National Marine Park By Speed Boat Angthong National Marine Park is 20 kilometers far from the west of Koh Samui. There consist of 42 islands with the area about 102 square kilometers. Adult THB 2,500 net / Child THB 1,900 net Koh Tao & Koh Nang Yuan By Speed Boat Koh Tao & Koh Nang Yuan, well - known by the excellent coral reefs, crystal clear water and colorful coral. The best time to enjoy one of these islands to the fullest is from January - October. Adult THB 2,300 net / Child THB 1,900 net