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New depth record in the Czech cave Hranicka Propast - 450 m! - video

While surveying the world’s deepest cave, Hranicka Propast, the exploration team found that it was as much as 46 meters deeper than thought. The famous Czech karst well Hranicka Propast has been the deepest flooded cave in the world since 2016. Until now, everyone believed that its maximum depth was 404 meters. However, recent findings
Published: August 2, 2022 - 12:35
Updated: July 23, 2023 - 01:07
New depth record in the Czech cave Hranicka Propast – 450 m! – video

While surveying the world’s deepest cave, Hranicka Propast, the exploration team found that it was as much as 46 meters deeper than thought.

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The famous Czech karst well Hranicka Propast has been the deepest flooded cave in the world since 2016. Until now, everyone believed that its maximum depth was 404 meters. However, recent findings by explorers have provided more detailed information about it. Czechs have determined that the cave, located in Moravia, is as much as 46 meters deeper and reaches a record depth of 450 meters.

Robot used to explore Hranicka Propast cave

The sixth day of the Hranicka Propasti exploration proved to be a breakthrough. We managed to repair and test the underwater robot and continued the exploration despite the bad weather. We concentrated on the exploration of the Mikado (200 m), from which we continued into deeper parts of the the press release reads.

As it turns out, the dizzying depth of 450 meters may not be the last word on the subject. The team of explorers prepared a mini-report on their activities and noted that equipment limitations stopped them from further exploration. However, the Czechs plan to return to the cave and continue exploration.

Exploring Hranicka

The areas we explored and mapped are vast. At a depth of 450 m we were stopped by the technical limitations of the underwater robot. We broke the old depth record by 46 m (404 m) and reached the target depth of 450 m. I would like to thank all the participants – members of our ZO, members of the Fire and Rescue Service of the Czech Republic – Hlučín Rescue Unit, employees of the Main Mine Rescue Service (state enterprise DIAMO), and especially employees of UNEXMIN GeoRobotics Ltd. We will keep you informed about the further course and progress of the action.

Computer profile of the Hranicka Propast karst well Photo: hranickapropast.cz


A magnificent and exciting expedition in search of unknown caves in Sulawesi is the topic we have presented in the 19th issue of our the DIVERS24 quarterly magazine! The digital version of the magazine is available free of charge, while the printed version can be purchased in our online shop.

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About author

Tomasz Andrukajtis
Editor-in-chief of the DIVERS24 portal and magazine. Responsible for obtaining, translating and developing content. He also supervises all publications. Achived his first diving certification – P1 CMAS, in 2000. Has a degree in journalism and social communication. In the diving industry since 2008.
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