World’s Deepest Underwater Cave

World’s Deepest Underwater Cave

National Geographic grantee and technical diver Krzysztof Starnawski is on a quest to explore what may be the world’s deepest underwater cave. Known as Hranická Propast, the cave is near the town of Hranice in the Czech Republic. The deepest (officially recorded) underwater cave is Italy’s Pozzo del Merro, which was measured at 1,286 feet (392 meters).

In previous dives, such as the one shown in this video, Starnawski pushed through a narrow passageway and dropped a probe that measured Hranická Propast at a depth of 384 meters before running out of cord. He’s back at the Czech cave with his team and will attempt again to measure a depth that he hopes will beat the Italian cave’s record. Teammate and filmmaker Marcin Jamkowski discusses what makes Hranická Propast unique, why scientists believe it may be the deepest cave, and why the team is so interested in exploring it.

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