Lager Koralle
Imgur – hellomynameisthatthingfromthewalls
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The urban explorers had unwittingly stumbled upon the secret back entranceway into the subterranean depths of Lager Koralle, built-in 1939 during World War II as a naval intelligence school.
Shortly after, the German Naval High Command moved into the underground bunker and transformed it into their U-Boat headquarters.
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