From a protected cove on Long Island, Dean’s Blue Hole—Earth’s deepest known underwater cave—plunges more than ... of the inland blue holes—deep, dark, sheltered, with little tidal ...

Take a deep breath and dive below the surface with cave-diving experts and scientists in the video above. Find out what it takes to plunge into the dark and mysterious world of underwater caves. Caves ...

The geology teacher spent most weekends exploring and mapping the island's complex system of underwater caves. "Mallorca is ... climb down to get water in the dark. "I decided to swim across ...

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 ...

Krubera Cave in the republic of Georgia is currently the deepest known cave, at 7,208 feet. But Dark Star, with so many areas still to survey, is a prime candidate to take over the title.

Submerged beneath the surface, underwater caves harbour a certain mysterious allure. Thanks to adventure-loving divers, we get a glimpse of these places below the water surface. They plunge into ...

A tunnel has been discovered beneath Mexico’s Yucatan Peninsula that scientists believe could be the largest underwater cave in the world. The 215.6 mile-long cave is connected by two of the ...

A group of divers have connected two underwater caverns in eastern Mexico to reveal what is believed to be the biggest flooded cave on the planet, a discovery that could help shed new light on the ...

At a popular geological park outside Melbourne, Australia, tourists have the opportunity to try caving. More than 50 people ...

The cave divers who went back for their friends Two days in an underwater cave running out ... but keeping calm in the dark can be difficult. "I always tell people it's a marmite sport," says ...

But there is hope, says Thymann, and documenting this dense habitat of underwater caves may be the first step in protecting the manatees that live there. Receive a weekly dose of discovery in your ...