Great Blue Hole
…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. The site was made famous by Jacques Cousteau, who declared it one of the top five scuba diving sites in the world. In…