The Berlin Underworld society has reaserched and documented historical subterranean constructions in Berlin since 1997. The Berlin Underworlds Association has been researching the history of Berlin’s hidden city, beneath its soil, with the goal of further exploration into the development and documentation of historical structures. Through numerous tours, the Association attempts to provide a realistic insight into the rapid urban development of the 19th century, the military history of Germany’s capital, and the division of Berlin.
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