Massweiler possessed a large cavern that had been used by Nazis in World War II. There were supposedly five levels in the cave, the lowest of which had trouble with occasional flooding. A large staircase for pedestrian traffic was near the highest point of the cavern, which led to an exit. Beside the stairs were rails that assisted in transport of earth from the cavern as it was being enlarged for German forces. The angle of this stair and matching rail system was estimated to be 30 degrees, and the height of the chamber approximately 175 feet.
Source: Wikipedia.org
Copyright: Creative Commons 3.0
Address: Maßweiler, Südwestpfalz, Germany
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