A Cold War nuclear bunker is buried deep inside a Colorado mountain. See inside the Cheyenne Mountain Complex.
NEWS | 04 December 2025
lighning bolt icon An icon in the shape of a lightning bolt. lighning bolt icon An icon in the shape of a lightning bolt. Impact Link Have an account? Log in . This story is available exclusively to Business Insider subscribers. Become an Insider and start reading now. Deep inside a Colorado mountain lurks a remnant of the Cold War era. Buried 2,000 feet beneath Cheyenne Mountain is a secret military complex, where 15 buildings can seal themselves off from the rest of the world within seconds in the event of a nuclear blast. The complex is said to be designed to withstand a 30-megaton nuclear blast, per the Guardian, which is about 2,000 times as strong as the 15-kiloton bomb that was dropped on Hiroshima. Construction on the complex, which is located about 10 miles from downtown Colorado Springs, began in 1961. Today, the secretive underground complex remains functional as a backup command center for the North American Aerospace Defense Command (NORAD), a US-Canada binational organization that provides aerospace warning and control over North America, and the US Northern Command (USNORTHCOM). Take a look inside.
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