Visit the island of Koh Tao & Koh Nang Yuan by speedboat from Koh Samui.
Koh Tao is a beautiful island of just 21 square kilometres, it is located about 70 km north of Koh Samui and it is far an hour and 30 minutes by speedboat.
Koh Tao & Koh Nang Yuan have many good sites for snorkelling and scuba diving, with hard and soft corals, clear water and a wide diversity of marine life.