Cenote Chac Mool is a cavern cenote south of Playa del Carmen that pairs crystal-clear water with a strong halocline, a sunlit chamber, and a darker zone filled with stalactites. It is an accessible guided dive that feels more like moving through a sculpted underground gallery than swimming a conventional reef. The site rewards calm buoyancy, a steady pace, and a comfortable Open Water diver who wants a clear cenote with dramatic light effects.