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.

Polish explorers check a footage from a remote-operated vehicle deep in the Czech Republic's deepest cave. AP Photo/ Marcin Jamkowski The deepest freshwater cave on Earth, the Hranice Abyss, stretches ...

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 ...

One of the most crucial revelations made in the second part of the final season of “Stranger Things” is the confirmation of ...

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The world's deepest freshwater cave, the Hranice Abyss, is over twice as deep as once thought, scientists have announced. The cave, in the Czech Republic, was found to be around 1 kilometer (3,280 ...