Dean's Blue Hole is also where the Vertical Blue Free Diving Competition is held where people travel from all around the world to see the free diver that can dive the deepest into the blue hole.

Dean's Blue Hole is the second deepest sinkhole in ... visibility of up to approximately 100 feet and mild waves. Scuba diving and free diving into the cavern is possible with the aid of expert ...

You can visit the Great Blue Hole with a number of dive services that operate out of Belize City, San Pedro and Caye Caulker. Note that the Great Blue Hole is only suitable for experienced divers.