Great Blue Hole of Belize

Long a secret known only to Belizean fisherman, the Belize Blue Hole became famous in 1971 when legendary marine biologist and undersea explorer Jacques Cousteau visited the site.

Cousteau and his crew aboard the Calypso explored the depths of the Blue Hole, confirming that it had been created thousands of years ago when rising tides flooded a network of caves. Declared by Cousteau as one of the top 10 best diving spots on the planet, the Belize Blue Hole is located approximately 60 miles (100 km) from the coast of Belize.

A nearly perfectly circular body of water, the Belize Blue Hole is surrounded by the Lighthouse Reef Atoll. Divers can use the shallow waters of the atoll’s lagoon to begin their descent to the now-flooded cave that contains stalactites and stalagmites up to 40 feet (12 meters) in length.The coral atoll surrounding the Belize Blue Hole has an inner ring of shallow, lighter colored water that forms a natural ring around the deeper sapphire waters of the flooded cave.

Thousands of years ago when the cave flooded, the Belize Blue Hole was formed, a vertical entrance over 980 feet (300 meters) across with a bottom more than 400 feet (125 meters) below the sea’s surface today.As divers descend into the Great Blue Hole, the dark waters start to become more clear, allowing for an impressive view of the flooded cave network that is home to a variety of marine life, including a few elusive hammerhead sharks.

Due to the complexity and depth of the dive, only experienced divers are permitted to explore the majestic underwater formations that make the Belize Blue Hole such a unique dive site.

The Blue Hole is located along the Belize Barrier Reef, a UNESCO World Heritage Site part of the second-largest barrier reef system in the world.

An almost perfectly circular area of dark topaz water encircled by the Lighthouse Atoll on the Belize Barrier reef, the Great Blue Hole is one of the most intriguing and popular places to dive anywhere on Planet Earth.

Facts About The Belize Blue Hole

1.) The Blue Hole measures about 1,000 feet in circumference and is more than 400 feet deep. It is the largest natural formation of this type found anywhere in the world.

2.) The Blue Hole was formed at the end of the last Ice Age when rising seawaters flooded a series of enormous caverns. Geologists have determined that the caves first formed about 153,000 years ago and were completely submerged approximately 15,000 years ago.

3.) The Blue Hole is approximately 60 miles offshore from Belize City and is part of the Belize Barrier Reef, a UNESCO World Heritage Site.

4.) In 1971, famed French marine biologist Jacques Cousteau visited the Blue Hole with his boat Calypso, declaring it one of the top 10 diving spots on the planet.

5.) The underwater caves of the Blue Hole are filled with giant stalactites, proof that it once existed above water.

6.) The Blue Hole is home to several species of sharks, including bull sharks, Caribbean reef sharks, and the elusive hammerhead shark.

7.) In 2012, the Discovery Channel ranked the Blue Hole as #1 on its list of 10 Most Amazing Places on Earth.

8.) The Blue Hole is visible from space, easily identifiable by its unique circular formation and location within the midst of the greater Belize Barrier Reef.

9.) The name “Blue Hole” was coined by the British diver Ned Middleton in his book “10 Years Underwater” published in 1988.

10.) Due to the complexity of diving required, the Blue Hole is restricted to experienced divers only with a minimum of 24 completed dives.