The Great Blue Hole, a massive underwater sinkhole, is one of Belize’s most famous natural wonders. Located in the Lighthouse Reef Atoll, this perfectly circular hole, over 400 feet deep, was formed during the last Ice Age. A flyover tour offers a spectacular bird’s-eye view, revealing the stunning contrast between the deep blue waters and the surrounding coral reef. This is the ultimate way to witness one of the world’s most iconic dive sites without getting wet!