Sonnenberg Tunnel

Buchrain, Switzerland

Sonnenberg Tunnel

The Sonnenberg Tunnel is a 1,550 m (5,090 ft) long motorway tunnel, constructed between 1971 and 1976 and located in Lucerne, Switzerland. At its completion it was also the world's largest civilian nuclear fallout shelter, designed to protect 20,000 civilians in the eventuality of war or disaster.


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