According to a listing on Zillow, the “underground Titan II missile complex” was once “one of the most top secret of government assets.” The complex is located on a 12-acre piece of land in Catalina, Arizona.
The complex was built in 1962 to be used as a missile silo. A silo, or a missile launch facility, is a cylindrical structure built underground that can be used to store intercontinental ballistic missiles (ICBMs), which are usually used for nuclearweapons delivery. In this case, the facility was used to store a type of ICBM called the Titan II.
According to the National Park Service, the Titan II was the “largest ICBM ever deployed [by] the US Air Force,” weighing around 330,000 pounds and standing 103 feet tall.
“The Titan II held a W53 warhead with an incredible nine megatons of explosive power (three times the explosive power of all the bombs used during World War II, including both atomic bombs). This warhead [is] twice as powerful as any other ICBM's warhead,” the National Park Service Explains.
The Cold War-era complex was decommissioned back in the 1980s by demolition crews.