The Great Blue Hole (or Blue Hole Natural Monument) is a popular attraction within the Belize Barrier Reef System, a UNESCO World Heritage Site. Located near the center of the Lighthouse Reef, it is a large, magnificent underwater limestone sinkhole off the coast of Belize. This natural phenomenon is approximately 1000 feet across and over 400 feet deep, and is the largest marine sinkhole hole on earth.
Divers descend into the Blue Hole’s tranquil abyss to see geological wonders and fascinating marine life. Giant stalactites, dripstone sheets, and columns are located in the Gallery at the southern rim of the Blue Hole. These structures formed in a dry cavern above sea level during glacial periods.
Jacques Cousteau revealed the secrets of the mysterious Blue Hole to millions of viewers in 1971 through the television series The Undersea World of Jacques-Yves Cousteau. Today, dive boats follow the way of the famous Calypso to explore one of the world’s best destinations for scuba diving. Come to Belize to experience the Great Blue Hole via diving trips, snorkeling trips, flyover tours, and skydiving jumps.