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7 Beach Dana Freed Georges V le G.O LOUL Mâra			0

The Regenwurmlager, which literally means Camp Earthworm, is an extensive underground fortification area constructed by Germany in 1920s-1940s, now in western Poland, near the city of Międzyrzecz. It was a system of underground bunkers interconnected by tunnels and corridors of total length over 100 km. In 1945 it was abandoned by the German troops retreating without significant fights.

http://izismile.com/2016/11/24/inside_ab..._pics.html