Boulder City
Boulder City is a chain of stacked granite boulders in open water off Ko Payan (island 3), a few hundred metres south-east of Sharkfin Reef. Because it is exposed, currents can be strong, and the many cleaning stations attract big fish such as giant barracuda, dogtooth tuna and trevally. Leopard sharks and Kuhl's stingrays rest on the sand around the deeper rocks, and golden sea fans and whip corals grow in the cracks. It is often the last dive of a southbound liveaboard trip.
depth: 5–35 m