The largest nuclear bomb shelter in the world.💣 #Switzerland #sonnenberg

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The Sonnenberg Tunnel is a 1,550m 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.

Switzerland is unique in having enough nuclear fallout shelters to accommodate its entire population, should they ever be needed.

Source: https://en.wikipedia.org/wiki/Sonnenberg_Tunnel, https://www.factretriever.com/switzerland-facts