The Secret Military Fortresses Hidden in the Swiss Alps

These clandestine bunkers helped keep Switzerland out of WWII. Now they house everything from museums to raclette cheese.

Swiss Mountain Fortress

The Secret Military Fortresses Hidden in the Swiss Alps

Switzerland's World War II Bunkers Get a Second Life - TIME

Self Sabotage: The Swiss Strategy of Rigging Vital Infrastructure to Explode - 99% Invisible

Switzerland's Historic Bunkers Get a New Lease on Life, Travel

THE SECRET WORLD WAR II FORTRESS HIDDEN UNDER THE TRANQUIL BEAUTY OF THE SWISS ALPS - The St Kitts Nevis Observer

Bunker switzerland hi-res stock photography and images - Alamy

16 haunting pictures of Switzerland's secret bunkers

Inside the Haunting Remains of Secret WWII Bunkers

Inside a Secret Military Bunker in Switzerland

16 haunting pictures of Switzerland's secret bunkers

Elaborate Underground Base - TV Tropes