Chumphon pinnacle is widely regarded as Koh Tao's best dive site. There are one big pinnacle and a separate smaller pinnacle called Barracuda Rock.
This site has one of the highest possibility of seeing Koh tao's favourite resident THE WHALE SHARK. Also Long fin batfish, Giant grouper,Great barracuda, lion fish and anemones covered the pinnacle.
Southwest Pinnacle is one of the amazing deep dive site. It consists of one main pinnacle surrounded by many smaller rocks. Also there is secret pinnacle to explore. Southwest Pinnacle is about 10km away from Koh Tao.
HTMS Sattakut originally launched in 1944 was commissioned by U.S Navy and used in WW2. The wreck lies between 22m-30m. is it is only available to Advanced divers or above.