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At Least 404 Meters Deep, Hranice Abyss In Czech Republic Is Now World’s Deepest Underwater Cave

Updated on 6 October, 2016 at 7:07 pm By

It is called the Hranice Abyss (or Hranicka Propast in Czech) and it has now been confirmed as the world’s deepest cave. The Hranice Abyss is located in Hurka u Hranic nature reserve in the eastern part of Czech Republic, around 300 kilometers from Prague.

Polish explorer Krzysztof Starnawski led a team to study the fissure and discovered that it ran at least 404 meters (1,325 feet) deep.


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Krzysztof Starnawski

Krzysztof Starnawski

The 48-year-old explorer himself dived into the abyss to measure its depth. Starnawski dived as deep as 200 meters from which point he sent an underwater robot tied to a cord.

The robot dived to a depth of 404 meters but did not hit the bottom indicating that the depth of the fissure is more than that.

The depth is 12 meters more than the previous record-holder Pozzo del Merro, a sinkhole, in Italy.

 

Krzysztof Starnawski

Krzysztof Starnawski



Starnawski has been trying to measure the depth of the abyss for the last 20 years. His last attempt was in 2015 when he dived to a depth of 265 meters.

The Czech Speleological Society said, “It was as deep as its rope could go, but the bottom was still nowhere in sight.”

The problem in measuring the depth arises out of the nature and composition of the water in the fissure, which is muddy and damages equipment.


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The temperature of the water is as low as 15 degrees Celsius

Starnawski’s team released a cross-section map which shows the fissure but ends with question marks at the bottom because the exact depth is not clear yet.

 

Krzysztof Starnawski

Krzysztof Starnawski


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National Geographic covered some of the expedition’s cost.

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