Cathedral Cave is an expansive underwater cavern that opens up to the sea's surface. With its walls plunging to 30 meters at the entrance and reaching depths of 55 meters beyond, it's a rich habitat for diverse marine life. Divers can encounter colorful nudibranchs, various invertebrates, and at the back of the cave, stingrays and moray eels, while reef fish and occasional pelagics can be seen just outside.