What is the diameter of the Great Blue Hole?

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Welcome, trivia enthusiasts, to another deep dive into the world of knowledge! Today, we’re exploring a question from “The Great Blue Hole Trivia Quiz” and uncovering the mysteries and measurements of this awe-inspiring natural marvel.

We’ll also venture beyond the surface level of facts as we debunk some myths and misconceptions that may shroud this geological spectacle.

So, fasten your mental seatbelts and prepare to descend into the fathomless unknown of the Great Blue Hole’s dimensions!

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The Great Blue Hole: A Geological Wonder

The diameter of the Great Blue Hole, the world’s largest underwater sinkhole, is approximately 1,000 feet.

Located near the center of Lighthouse Reef, a small atoll off the coast of Belize, the Great Blue Hole is a stunning natural formation that has captured the imagination of divers, scientists, and explorers for decades.

Formation and Discovery

The Great Blue Hole was formed as a limestone cave during the last Ice Age when sea levels were much lower. As the ocean levels rose, the cave flooded and its roof collapsed, creating the perfectly circular, deep blue sinkhole that we see today. While the Great Blue Hole’s existence was known to local fishermen for generations, it was Jacques Cousteau who brought this geological wonder to the world’s attention in 1971 when he explored its mysterious depth.

Size and Depth

The Great Blue Hole measures an impressive 1,000 feet across and plunges to a depth of over 400 feet. The hole’s deep azure color and its submerged caves make it a magnet for divers seeking an otherworldly experience. The crystal-clear waters reveal ancient stalactites, making it a natural wonderland for photographers and underwater explorers.

Ecological Significance

Apart from its geological significance, the Great Blue Hole’s ecological importance cannot be understated. The surrounding reef system, including Lighthouse Reef Atoll and the Belize Barrier Reef, which the Great Blue Hole is part of, was declared a UNESCO World Heritage Site in the early 1990s. The area’s diverse marine life and coral formations draw scientists and conservationists who are dedicated to preserving this natural treasure for future generations.

Misconceptions about the Diameter of the Great Blue Hole

The Great Blue Hole is a natural wonder off the coast of Belize, making it an enticing subject for misconceptions. Let’s take a closer look at some popular misunderstandings about its diameter.

Over 2,000 feet

Contrary to popular belief, the diameter of the Great Blue Hole is not over 2,000 feet. Although it may appear larger due to its stunning visual impact from the air, geological surveys have confirmed its diameter to be approximately 1,000 feet.

About 500 feet

Some may underestimate the size of the Great Blue Hole and believe its diameter to be about 500 feet. However, this is far from accurate. At around twice this size, the hole’s actual diameter is measured at approximately 1,000 feet, reinforcing its status as one of the largest marine sinkholes in the world.

Nearly 1,500 feet

It’s a common misconception that the Great Blue Hole is nearly 1,500 feet wide. Despite its imposing appearance and the optical illusion it creates, comprehensive studies have consistently shown its diameter to be closer to the 1,000-foot mark. This magnificent marine phenomenon continues to capture the imagination of divers and explorers alike with its true dimensions.


So there you have it – the diameter of the Great Blue Hole is approximately 1,000 feet, making it an awe-inspiring natural wonder.

We hope you enjoyed learning more about this remarkable geographical feature. If you’re hungry for more brain-teasing trivia, why not test your knowledge with our Great Blue Hole Trivia Quiz? Click below to dive in and see how much you really know!

Professor Leonard Whitman