This incredible natural wonder is located off the coast of Belize in the Caribbean Sea. The Great Blue Hole is a giant submarine sinkhole, measuring over 300 meters (984 feet) across and 124 meters (407 feet) deep. It is an incredible sight to behold, with its deep
The Great Blue Hole is a large marine sinkhole off the coast of Belize. It lies near the center of Lighthouse Reef, a small atoll 70 km (43 mi) from the mainland and Belize City. The hole is circular in shape, 318 m (1,043 ft) across and 124 m (407 ft) deep. It has a surface area of 70,650 square metres (760,500 sq ft). It was formed during several phases of the Quaternary glaciation when sea levels were much lower. Analysis of stalactites found in the Great Blue Hole shows that formation took place 153,000, 66,000, 60,000, and 15,000 years ago. As the ocean began to rise again, the cave was flooded. The Great Blue Hole is part of the larger Belize Barrier Reef Reserve System, a UNESCO World Heritage Site.