He Dives to the Bottom Of The World's Deepest Salt Water Blue Hole, And It's Terrifying

Dauntless freediver Guillaume Néry recently did a dive in "Dean's Blue Hole," a 202 meter (663 ft.) deep blue hole, just off the coast of Long Island, Bahamas.

A "blue hole" is an underwater sinkhole, and this one just so happens to be the deepest known salter water blue hole in the world. At its surface, it has a diameter of roughly 25 to 35 meters (82–115 ft) - at its floor, the diameter expands to a whopping 100 metres (330 ft), almost quadrupling in size. Suffice it to say, not many people have the courage to come near it, let alone dive to its ominous bottom.