Old Elbe Tunnel or St. Pauli Elbe Tunnel (German: Alter Elbtunnel (coll.) or St. Pauli Elbtunnel (official name)) which opened in 1911, is a pedestrian and vehicle tunnel in Hamburg, Germany. The 426 m (1,398 ft) long tunnel was a technical sensation; 24 m (80 ft) beneath the surface, two tubes with 6 m (20 ft) diameter connect central Hamburg with the docks and shipyards on the south side of the river Elbe. This meant a big improvement for tens of thousands of workers in one of the busiest harbours in the world.
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