Koh Tao has a few of the most beautiful snorkel sites in Thailand, and with this tour, you can enjoy them in a private way. Snorkel with colorful fish and corals at Mango, Lighthouse, Hin Wong, and Leuk Bay. At Shark Bay, you'll have the chance to spot blacktip reef sharks and green turtles.

If you feel fit for a hike, walk up to the viewpoint at Nang Yuan overlooking the unusual island formation. With the morning departure, you can reach the Nang Yuan viewpoint without the big crowds as this will be your first stop right when it opens.