13 Abandoned Cold War Bunkers Hiding Incredible Secrets

2. Cheyenne Mountain Complex, USA: The Mountain Fortress

Immortalized in films like WarGames and the Stargate series, Cheyenne Mountain in Colorado isn't fiction. It houses a legendary command center built deep inside granite mountains. Designed to withstand direct nuclear hits, NORAD and USNORTHCOM operated from within massive chambers mounted on giant springs to absorb shockwaves. While its primary command functions have moved, the facility remains operational. Its secret isn't just its existence, but the sheer audacity of carving a self-sufficient, nuclear-proof nerve center into the heart of a mountain – Cold War engineering at its most extreme.