Like a pinprick piercing the azure Caribbean Sea, the Great Blue Hole is as mysterious as it is mesmerizing. From above, this almost perfectly circular underwater sinkhole is a deep, dark bullseye ...

Over the past 15 years, around 150 divers have lost their lives visiting the Blue Hole in Egypt, with estimates suggesting ...

Blue holes are worldwide attractions for amateur and professional divers alike. Here are the world's five best blue holes. Snorklers swimming over Dean´s Blue Hole with a depth of 202 meters on June ...

Diver Dominik Černý has shared footage from just outside a notorious submarine sinkhole showing a little fish cleaning the inside of his mouth. In a Reddit post, he said: "Under me were [a] few ...

They were rolling in the deep. Scientists have identified what could potentially be the “deepest known blue hole” in the world, extending so far down that the bottom has not yet been reached.

Shaped like an hourglass, the hole starts about 150 feet below the surface and goes down to a 425-foot depth. It had never been explored scientifically before this summer. On Aug. 31, a team of Mote ...