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Seegrotte

Coordinates: 48°05′09″N 16°15′27″E / 48.08583°N 16.25750°E / 48.08583; 16.25750
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Boat tour briefing

The Seegrotte, near Hinterbrühl, Austria, is a cave system with a large grotto located under a former gypsum mine.

It was closed in 1912 after the mine flooded with 20 million litres of water. It became a tourist attraction after 1930 and has been one ever since, with the exception of World War II.[1][2] The lake is 60 meters below ground, the water surface is 6200 m² and pumps are used to keep the water level down.[2]

Visitors can tour the old mine and take a boat ride across the underground lake.

World War II history

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During World War II the Seegrotte was used for production of Heinkel He 162A jet fighters in Nazi Germany's "second Ruhr".[1][3]

References

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  1. ^ a b "Development of the He 162". 18 January 2023. Archived from the original on 2013-10-02.
  2. ^ a b "Die Seegrotte Hinterbrühl". 18 January 2023.
  3. ^ Galland, Adolf (1968) [1954]. The First and the Last: The Rise and Fall of the German Fighter Forces, 1938-1945. Ninth Printing - paperbound. New York: Ballantine Books. p. 237.
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48°05′09″N 16°15′27″E / 48.08583°N 16.25750°E / 48.08583; 16.25750