Belongas Bay: The Cathedral Dive Site – South Lombok

Site Overview

The Cathedral is one of the most visually stunning dive sites in southern Lombok, featuring a massive underwater limestone cave chamber that earns its name from the dramatic light rays that stream through openings in the ceiling, creating an awe-inspiring cathedral-like atmosphere. The cave entrance faces the open Indian Ocean, where the nutrient-rich currents bring abundant marine life past the limestone walls. Inside the chamber, grey reef sharks and whitetip reef sharks rest on the sandy floor, seemingly undisturbed by the light show above them. The cave walls are encrusted with sponges, soft corals, and colorful invertebrates that glow under torch light. Outside the cathedral, the surrounding wall drops from 5 meters to 35 meters and is covered in prolific soft coral growth sustained by the strong currents. Eagle rays and schooling barracuda patrol the outer wall, while lobsters and moray eels shelter in the numerous crevices. The site requires advanced diving skills due to the strong currents, overhead environment inside the cave, and exposed ocean position. The best light effects occur during mid-morning dives when the sun angle maximizes the light penetration through the ceiling openings. The Cathedral is typically combined with The Magnet for an unforgettable day of south Lombok diving that combines spectacular geology with thrilling pelagic encounters.