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The Great Blue Hole Belize was made famous by Jacques Cousteau in 1971 and the world's scuba divers have actually been coming to take pleasure in Belize Diving ever since. The Blue Hole Belize is about 410 feet throughout in a best circle and nearly 400 feet deep. Scuba diving in Belize is wonderful without the Great Blue Hole Belize, but with it, Belize ends up being one of the top 5 dive spots on planet Earth.