Cambodia
A small, little-visited archipelago of 12 islands in the Gulf of Thailand off Koh Kong province's Botum Sakor National Park, centred on Koh Sdach.
Koh Sdach is the capital island of a 12-island archipelago about 1.5 km off Botum Sakor National Park. Two dive centres operate from Koh Sdach; nearby Koh Prins (whale shark sightings December/May) and Shark Island (black-tip reef sharks) extend the diving grounds. Reefs are described as less damaged than more touristed areas due to low visitor numbers. Source: Wikipedia (Koh Sdach), cambodianess.com, movetocambodia.com.