Coral Lagoon in Mellieħa, Malta, is a stunning natural sea cave and swimming spot known for its crystal-clear turquoise waters and unique rock formations. Accessibility can be challenging, involving a rocky descent, so sturdy footwear is recommended. It is suitable for both solo adventurers and guided tours, with guided kayak tours being a popular option. The best time to visit is during the warmer months (May-September) for swimming; avoid during rough sea conditions. Visiting is generally free, though kayak tours will incur a cost (approximately €20-€40). A typical visit lasts 2-4 hours, allowing time for swimming, exploring the cave, and enjoying the coastal scenery. Be aware that the cave can get crowded during peak season.