Carved deep into the granite of Colorado’s Front Range lies one of America’s most secretive Cold War creations: the Cheyenne Mountain Complex. Built to survive nuclear war, this underground fortress housed command centers, power plants, reservoirs, and even living quarters—an entire city inside a mountain. Protected by 25-ton blast doors and thousands of feet of rock, it became the nerve center of NORAD, watching the skies day and night. But beyond its serious mission, Cheyenne Mountain captured