Ko Pha-ngan has lovely sites around the island which are perfect for both beginners and trained divers. From easy dives off the beach to longer trips by boat you can experience the world of tropical diving. The waters around Ko Pha-ngan are much nicer than most people know: fine hard corals with a good range of reefs and tropical/pelagic fish. Sailrock, undoubtedly the most famous dive site in the Gulf of Thailand. Between Ko Pha-ngan and Ko Tao, all the wonders of this exciting site can be explored by all levels of divers. This spectacular rock rises out of the water creating the best wall dive with a maximum depth of 40 m. Providing a great range of marine life, spectacular underwater scenery, rock formations. There are several PADI dive-schools on the island, including: Haad Yao Divers a PADI 5 Star IDC Dive Resort on Haad Yao and Haad Chao Phao; Reefers Dive Resort on Haad Yao Beach; Sail Rock Divers; Lotus Dive Resort, both in Chalok Lam. You will, however, find many more dive schools throughout the island. Under Thai law, dive operators must be registered with the Tourism Authority of Thailand to improve quality of service, safety and help protect the customer from fraud. Check to make sure you are booking with a TAT registered dive centre.