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Last preserved Titan II complex in the United States, the underground silo located south of Tucson houses a command center, armored doors, access tunnel, and a test missile, revealing the routine of teams that remained on alert during the Cold War
An underground silo preserved in Arizona exposes the command structure, armored tunnels, and the Titan II missile that were part of the United States’ nuclear deterrence during the Cold War, revealing how teams remained on permanent alert for an order that never came.
The last preserved Titan II complex in the United States houses, under the Arizona desert, a deactivated nuclear missile silo from 1987, with a command center, tunnels, and a test missile open to the public at the Titan Missile Museum.
Underground silo shows the structure of the Cold War
Known as Complex 571-7, the site is located south of Tucson and is the only remaining part of a network of 54 Titan II facilities. The space was featured in a documentary by filmmaker and YouTuber Kirsten Dirksen, from Fair Companies, offering a rare view of a base kept in permanent readiness.
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The Titan II entered service in the early 1960s as a second-generation intercontinental ballistic missile. Over 30 meters tall, it was designed to carry a thermonuclear warhead measured in megatons over thousands of kilometers.
Command center was located 10 meters below ground
Visitors access the complex through a reinforced portal and descend about 10 meters to the command center. The three-story structure was suspended by giant springs to reduce impacts caused by nearby launches or shock waves in the ground.
During alert shifts, four people remained inside the facility for 24 hours. The space included bunk beds, a small kitchen, bathrooms, and common areas, as well as its own power generation, air filtration, stored water, and escape routes.
Preserved missile never carried a nuclear warhead
The silo is approximately 42 meters deep and houses a test Titan II missile in launch position. It never carried a nuclear warhead, but shows the scale of the original system.
Launch orders required coded messages, verification by multiple people, and a strict sequence to prevent unauthorized use. After the end of the Cold War, almost all complexes were demolished by arms control agreements.
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