The Cheyenne Mountain Complex is a nuclear bunker that sits in the Colorado mountainside. Have you ever driven by its ominous entrance? | Boulder Now

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

Unlocking Secrets of Cheyenne Mountain: A Military Fortress Explained Let's dive into the mysterious Cheyenne Mountain Complex! Number five: It's not just any military base—it's a fortress built deep inside a mountain. Four: This place can withstand a 30-megaton nuclear blast. Imagine that power! Three: It was the real-life inspiration for the iconic movie WarGames, housing critical defense operations. Two: In 2015, the complex began receiving upgrades to protect against electromagnetic pulses.