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0:55
YouTube
National Geographic
First Look: Go Inside the World’s Deepest Underwater Cave | National Geographic
A Czech-Polish team of explorers has discovered that an underwater cave known as Hranická Propast in eastern Czechia (Czech Republic) drops to a point about 1,325 feet below ground, making it the deepest opening of its kind in the world. For team leader and National Geographic grantee Krzysztof Starnawski, the discovery is the culmination of ...
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