Koh Tao is located in southern Thailand facing the Gulf of Thailand. Koh Tao is to the north of Koh Samui and Koh Phangan. Underwater visibility is exceptional in Koh Tao, the island is home to vibrant and beautiful coral and abundant marine life, and it provides an excellent diving conditions, making it one of the world’s most famous diving and snorkeling spots. The waters of Koh Tao are crystal clear. Koh Tao has a lot of reefs, and the water temperature is like that in a bathtub. Within a radius of 20 km around the island are underwater hills that provide good diving spots. This is why Koh Tao has become diving site.