The Taam Ja’ blue hole, a massive underwater chasm in Chetumal Bay on the eastern coast of Mexico’s Yucatán Peninsula, has ...

Blue holes, the name for collapsed limestone caves filled with sea water, also serve as important repositories for storm data due to sediments captured with in their low-oxygen bottom layers.

Following is a transcript of the video. Narrator: There's a massive underwater sinkhole off the coast of Belize that extends 125 meters into the Earth's crust. It's called the Great Blue Hole.

This story appears in the August 2010 issue of National Geographic magazine. We sink into Stargate, sweeping the void with our dive lights. Fifty feet from the surface looms a pale haze, less ...

Named for its deep turquoise, crystal-clear water, the Blue Hole is located a little over a mile from the heart of Ocho Rios. Past visitors have said a trip to this natural wonder is a must-do ...

Tropical storms have been steadily increasing in frequency over the past 5,700 years, new evidence from sediment in the Great Blue Hole reveals, with a massive spike in the past two decades.

They often appear as a dark blue colour due to its depth, creating a distinct visual contrast against the surrounding water ...

This story appears in the July 2017 issue of National Geographic magazine. Explorers lie, at least to themselves—myself included. We rationalize our monomaniacal passions and risktaking under ...

Beneath the land surface of the Bahamas, the underwater caves known as blue holes stretch for hundreds of miles in all directions. Today, these labyrinthine passages host a variety of tiny sea ...

Here’s what you need to know before visiting the Great Blue Hole. Like a pinprick piercing the azure Caribbean Sea, the Great Blue Hole is as mysterious as it is mesmerizing. From above, this ...