Guillaume Nery base jumping at Dean’s Blue Hole, filmed on breath hold by Julie Gautier from Umblu Liber on Vimeo.

Here’s an article about the last free dive of American record holder, Nicholas Mevoli, who died in November 2013 after reaching over 200 feet without fins or oxygen. It happened at Dean’s Blue Hole. The video above is way too long, but it will give you an idea of what this place looks like.

Dean’s Blue Hole, a gaping underwater cave on Long Island in the Bahamas, is the deepest undersea grotto in the world. While Everest may be the Holy Grail for hikers worldwide, Dean’s Blue Hole, at 663 feet deep, is beguiling for those daring individuals known as free divers. The location, believed by locals to be the work of the devil, is the site of the annual Vertical Blue, which has been called the Wimbledon of free diving. Free diving is a type of diving that has become popular amongst extreme sports enthusiasts, and involves the diver trying to go as deep as he or she can on just one breath. There’s good reason the islanders ascribe diabolical origins to the hole, as it has claimed multiple human lives.