Titan Missile Museum, Military museum and National Historic Landmark in Sahuarita, US.

The Titan Missile Museum is a military museum and National Historic Landmark in Sahuarita housing a deactivated Titan II missile in an underground silo complex. Eight levels deep in the ground contain reinforced concrete walls and heavy steel doors designed to protect the missile and its launch equipment.

This installation operated as an active missile launch site from 1963 to 1984, housing an intercontinental ballistic missile during the Cold War. After the conflict ended, the facility was deactivated and eventually opened as a museum for public education and historical preservation.

The site keeps its original launch console, a pale green metal desk with rows of small rectangular buttons and indicator lights, some lit orange, and two small digital displays. Guides explain that the crew commander pressed a button here to select one of three pre-programmed targets, whose identities were withheld from the crew; the site was set to strike "Target Two" when it closed.

Guided tours enter the underground complex through the access portal and its blast locks, passing three-ton blast doors and reinforced concrete walls up to 8 feet thick. The standard tour reaches level two of the silo, where the 103-foot missile is viewed up close; the lower silo levels are closed to visitors. A longer top-to-bottom tour runs several times a month for no more than six people and takes up to five hours. The site is at 1580 West Duval Mine Road in Sahuarita, off I-19, about 40 km south of Tucson.

The silo doors remain permanently fixed in a half-open position due to an international agreement between the United States and the Soviet Union. This unusual detail reveals how closely inspections and verification were regulated during the Cold War era.