Hin Khao also known as North Rock has as much coral life as South Rock and has lots of rock outcroppings that are home to many sharks and eels. This is an excellent site for searching around for themore unusual nudibranchs, pipefish, razorfish and others that like to hide away. The site has good diving down to around 18 metres. Koh Rin bay is part of the main island of Koh Rin. Although this site only goes down to a maximum depth of 16 meters it is not well protected from currents and therefore should be dived when the currents are more favorable.The west side offers a very protected dive site that is excellent for training dives and is acceptable for qualified divers, especially when the currents and/or waves are strong. Just off Koh Rin on the west side there is a deep hole of over 40 meters deep with sometimes some interesting things to see and is perfect for the adventurous diver in times of currents.