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Berlin is located in a swamp. If you dig 3 feet you will hit water. Due to this problem the local brewers had storage problem since the brewing process and beer storage needs a stable temperature and humidity. So they were the first to built underground storage areas in one of the 3 hills surrounding Berlin. After WW-I the U-bahn (subway) was being built in Berlin and draining projects started. The underworld of Berlin consists since the mid-1930 of tunnels and bunkers.

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7y ago

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