Koh Tao is a small island north of Koh Samui and Koh Phangan. Restaurants, nightspots and dive shops cluster in Mae Haad Beach and near Sai Ri Beach. Villas dot palm-fringed beaches such as Chalok Baan Kao Bay, on the south coast. In the northwest, Koh Nang Yuan is a group of islets with hilltop views. Koh Tao is known for its tropical coral reefs, with species including whale sharks and rays. Hawksbill and green turtles gather here to breed.