Lighthouse Reef is a small atoll located off the coast of Belize in the Caribbean Sea. It is part of the Belize Barrier Reef, a UNESCO World Heritage Site, and is known for its stunning marine biodiversity. The atoll features a variety of ecosystems, including coral reefs, mangroves, and lagoons, making it a popular destination for snorkeling and diving. One of the most famous attractions within Lighthouse Reef is the Great Blue Hole, a large underwater sinkhole that is over 300 meters wide. This natural wonder draws divers and tourists from around the world, eager to explore its unique geological formations and vibrant marine life, including species like sharks and tropical fish.