Dive Hin Muang and you'll experience the thrill of diving the highest vertical wall in Thailand. The southern side descends to over 60 metres and on the eastern side where the slope is gentler, 2 long ridges descend out into the blueness.

A completely submerged rock formation, Hin Muang has an incredible amount of marine life. It derives its name (meaning Purple Rock) from its dense covering of purple soft corals. The rock itself is approx. 200 metres by 20 metres and is shaped something like an immense loaf of bread.