Sascha is a U.K.-based trainee staff writer at Live Science. She holds a bachelor’s degree in biology from the University of Southampton in England and a master’s degree in science communication from Imperial College London. Her work has appeared in The Guardian and the health website Zoe.
Coordinates: 49.53214473576795, 17.750610529720298The Hranice Abyss — or"Hranická propast," in Czech — is the deepest known freshwater cave in the world. Geologists think it could extend more than half a mile below Earth's surface, which is more than twice as deep as the world's next-deepest freshwater cave.
Scientists first described the Hranice Abyss in 2016, after conducting numerous dives inside the cave. Researchers then deployed a remotely operated vehicle to explore the corners that divers couldn't reach and measured a maximum depth of 1,553 feet , according to the 2020 study. The opening of the Hranice Abyss is an inclined cavity with a small lake at the bottom, according to the latest study. The underwater portion of the cave is an irregular, vertical cylinder ranging from 30 to 100 feet in diameter. Water temperatures in the cave vary between 58 and 66 degrees Fahrenheit depending on the time of year.
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