Palancar Caves is a boat-dived section of the Palancar Reef system off Cozumel, defined by massive coral buttresses, open swim-throughs, and cavern-like passages that stay lit from the surface. The dive runs as a multi-level drift, dropping deeper at the start and then working shallower across the reef. Plan it as a guided reef dive for divers who are comfortable with current, depth changes, and steady buoyancy. The passages are open rather than true cave penetrations, but the terrain still rewards careful spacing and controlled trim.