Among the many diving claims to fame held by the Bahamas, perhaps the greatest is the sheer number and variety of blue holes. The islands’ sedimentary limestone base, composed of the skeletal remains of oceanic inhabitants, has been carved out by a varying sea level over millennium (the seas were some 400 feet lower 10,000 years ago) and the action of carbolic acid in the limestone. This has created a complex network of caves and caverns underlying the surface of the seafloor. In areas where the ceilings of these caves have fallen in, divers have an opportunity to explore vast cavern systems.

The classic form of a blue hole is circular, extending in a bell shape beneath the surface. However, some open into the edge of an oceanic wall or are simply oblong openings in a shallow reef. In addition, not all are oceanic. Many blue holes are found inland, hidden within the confines of the pine forest. This has created a variety of opportunities for exploration, many well suited for investigation by novice to intermediate divers.

For the more advanced and trained cave diver, The Bahamas delivers absolutely world-class exploration experiences. Many world records have been set in these systems over the past three decades. The deepest known blue hole in the Bahamas reaches down to 650 feet, and many systems drop to around 300 feet and then extend into a network of caverns and caves at the bottom. Skeletal remains of both humans and animals have been discovered, somber reminders of the past, and an utterly unique repository for Bahamian history.


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