Deep under the "Bürgerpark" of the city of Osnabrück, Lower Saxony exist an very old, big human made cave system. Nobody know who created it and when it was made. It was used as a quarry, a beer brewery storage, a mushrom farm, was converted as a bomb shelter in WW2 and was long time forgotten and locked up for the public after the war. The association Getrudenberger Höhlen e.V. was founded to protect and discover the cave system for the future and open it to the public. By the way, I`m a member of the association too.
More information at Gertrudenberg - Gertrudenberger Höhlen Osnabrück e. V. or Getrudenberger Höhlen Osnabrück e.V. .
More information at Gertrudenberg - Gertrudenberger Höhlen Osnabrück e. V. or Getrudenberger Höhlen Osnabrück e.V. .
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