Why it's incredible: The cave is so deep, the world's tallest building could fit inside it. The Hranice Abyss — or "Hranická propast," in Czech — is the deepest known freshwater cave in the world.

A British diver has been found dead nearly 300ft down a French cave network two days after he went missing. The 43-year-old was found on Sunday after he disappeared during a Friday dive in the ...

New research suggests Hranice Abyss—the world’s deepest freshwater cave—is around 0.6 miles (1 km) deep, which is more than twice the depth of previous estimates. Back in 2016, scientists measured the ...

Hidden beneath a wooded hillside near Hranice, a Czech town, lies one of Earth’s biggest geological mysteries. Named the Hranice Abyss, it is recognised as the world’s deepest known freshwater flooded ...

Tom has a Master's degree in Journalism. His editorial work covers anything from archaeology and the environment to technology and culture. Tom has a Master's degree in Journalism. His editorial work ...