Spreetunnel Stralau-Treptow
Spreetunnel Stralau-Treptow, Underground tramway tunnel beneath the Spree River in Berlin, Germany
The 454-meter single-track tunnel runs twelve meters below the Spree River, connecting the Stralauer Peninsula to Treptower Park in Berlin.
Constructed between 1895 and 1899, this tunnel marked Germany's first implementation of the shield driving method for underground construction beneath water.
The tunnel system earned the nickname 'Knüppelbahn' due to its control method where drivers exchanged wooden sticks at each entrance to regulate traffic.
The tunnel operated until 1932 when structural damage forced its closure, and it was later converted into an air raid shelter during World War II.
During inspections in 1996, workers discovered the preserved air raid shelter section containing original furnishings from the 1940s.
Location: Friedrichshain-Kreuzberg
Location: Treptow-Köpenick
GPS coordinates: 52.48917,13.47750
Latest update: May 14, 2025 03:16
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