Tachai Island is a part of Similan Marine National Park. This little island, the northernmost of Similan, becomes the most popular site for snorkeling for quite a few years. Hopping on the speedboat just for one hour and a half in about 55 km. from northern Khao Lak, you will find the crystal clear water with the power white sand beaches. Its shape is suitable for snorkeling and diving in various depths. This is one of the best tropical islands in Andaman sea with its untouched in archipelago and the alluring nature. Experience it yourself!