Cathedral Cave is a cave and reef dive site near Valletta, Malta, in the Mediterranean Sea. Its listed dive types are cave and reef. It is reached from shore. The site is rated for advanced divers, has an overhead environment, and reaches depths of 30 metres. It is described as a well-known cavern dive in the Mediterranean. Big reef fish, cephalopods, crustaceans, and frogfish and scorpionfish are occasionally seen. Nudibranchs are also occasionally seen, while seahorses and pipefish are seen rarely.