Discover the best snorkeling spots around Koh Tao with a one-day trip to Koh Nangyuan, Mango Bay, Ao Hin Wong, Aow Leuk and Shark Bay on a modified fish cutter operated by Sangthong Tours. Walk on the iconic beach that links the group of three islands of Nangyuan and snorkel in turquoise green and beautiful waters that are full of marine life.