The Great Blue Hole: A 400 Foot Deep Diver’s Paradise in Belize

In 1971, legendary French marine explorer Jacques Cousteau journeyed to an obscure sinkhole in Belize and dubbed its royal blue waters one of the best diving spots in the world. A circular expanse of water dubbed The Great Blue Hole by a British diver is visible from space, and contains a stunning network of submerged caves that contain aquatic and geological wonders that have wowed even the most seasoned divers.

Great Blue Hole, off of Belize

Countless divers have explored the The Great Blue Hole’s shallow waters. Sea turtles, midnight parrotfish, colorful coral reefs, and eels swirl just below The Great Blue Hole’s azure surface. In 2018, a submarine crew decided to explore The Great Blue Hole’s deepest depths. Once the submarine crew descended about 300 feet, they entered a dead zone that did not support plant or animal life of any kind. Scientists attribute the dead zone to an inhospitable cloud of hydrogen sulfide which essentially suffocates any living thing that it comes in contact with. Below the border of the dead zone, scientists spotted several artifacts of modern life that had been sucked into the lower depths of the sinkhole—including a soda bottle and camera which most likely contained some lovely shots of Belize. The submarine crew even spotted more than one deceased human being. The bodies most likely belonged to explorers and tourists who were swept away by the sinkhole. The submarine crew decided that it was best to leave the sunken bodies undisturbed. The deathly quiet bottom of the seafloor is a peaceful resting place for any lifeless human.

The 2018 submarine crew who journeyed to the bottom of The Great Blue Hole also discovered stalactites. Stalactites signal that The Great Blue Hole was once a massive cave that formed on dry land. The vertical orientation of certain submerged cave features suggests that there has been a great deal of geologic activity that has changed The Great Blue Hole’s position over time—in addition to rising sea levels which caused water to rush in.

What's At The Bottom Of The Great Blue Hole?

Erosion from powerful storms and the constant churning of ocean waves is slowing causing The Great Blue Hole to fade away. Diving enthusiasts still have several centuries to enjoy the arresting beauty of The Great Blue Hole.

The Great Blue Hole

If you’re going to brave the waters of The Great Blue Hole, it is important that you refine your scuba skills at a more tame location before attempting to navigate the sharp ledges and spiky coral of one the world’s most celebrated yet treacherous diving spots. More than a few inexperienced divers have been sucked into the depths of The Great Blue Hole’s dead zone. You can always journey to the edge of The Great Blue Hole by boat and gaze into its turquoise interior. It is incredible to consider that The Great Blue Hole is lined with silt that dates back to the time before the Mayan Empire. The Great Blue Hole is a stunning aquatic geologic history book that reveals so much about the epochs that preceded our current era.

Great Blue Hole, Belize

Great Blue Hole, Belize

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