Skydiving into the Blue Hole, Belize
The Great Blue Hole is a stunning circular jewel surrounded by a ring of shallow luminous coral reef in the Lighthouse Reef Atoll. Measuring 1,000 feet across and more than 400 feet deep, this ocean-floor limestone sinkhole is believed to be the world's largest blue hole, made famous by Jacques Cousteau. Atolls are characterized by a large, fairly shallow lagoon surrounded by coral reefs. Only four known true atolls exist in the Western Hemisphere, and of these, three reside in Belize: Turneffe, Lighthouse and Glovers.