Biodiversity is one of the most important reasons why people want to see Great Blue Hole. In particular, this place is home to several shark species including Caribbean reef sharks, nurse sharks, hammerheads, bull sharks, and black tip sharks.
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Scientists believe the cave formed during the last Ice Age, which ended about 14,000 years ago. The cave flooded and collapsed as the Ice Age ended and sea levels began to rise, leaving behind the Blue Hole we see today. Researchers also predict it won't be around forever.
The hole is perfectly circular in shape, over 300 meters (1000 ft) across, 3140 feet circumference and 125 meters (410 ft) deep. It was formed as a limestone cave system during the last glacial period when the sea level was 400 to 500 feet below present time and was dry land.
Believed to be the world's largest feature of its kind, the Great Blue Hole is part of the larger Belize Barrier Reef Reserve System, a World Heritage site of the United Nations Educational, Scientific and Cultural Organization (UNESCO).
Tourism. The Great Blue Hole is a popular spot among recreational scuba divers who are lured by the opportunity to dive in sometimes crystal-clear water and meet several species of fish, including midnight parrotfish, Caribbean reef shark, and other juvenile fish species.
The Diving Skills Needed for the Blue HoleYou will need at least an Open Water or Advanced Open Water diving certification for this dive. Divers must be very comfortable in their gear, have excellent buoyancy control and be able to equalize easily. Good physical health is also required.