Cathedral

Cathedral is an offshore rocky reef notable for a dramatic natural rock arch and a large cavern that give the site a cathedral-like appearance. The central feature is a big round hole several meters deep with a high vaulted ceiling and an overlying rock bridge; the sandy-bottomed cavern is roughly 20 meters across and coral-encrusted walls shelter a variety of reef life. The reef slopes into pinnacles and ledges and is widely regarded as one of the most popular, frequently dived sites. Diving is by boat entry into clear, warm water. Depths range from about 10 m at the top of the reef to around 27–29 m at the bottom. Visibility commonly exceeds 15 m and water temperatures are about 20–24 °C, so a 5 mm wetsuit is recommended. Currents can be moderate to strong and dives are often done as drift dives; divers should plan for changing flow and perform a safety stop near the surface. Access is restricted to boat dives by certified operators and a special entry permit is required. Divers entering the large cavern must use proper buoyancy control to avoid stirring sediment. No dive lights or special restricted-entry precautions are typically needed beyond standard safety practices, and the site's depth and overhead terrain favor experienced divers; guides often lead through the arch into the main cave before circling back along the reef.