1. Balaklava Submarine Base. Black Sea base for submarines also housed a series of tunnels that reached into the mountains. Top Secret Location run by the Soviet Union.
2. Beelitz Heilstatten Military Hospital. Famous as a set for The Pianist and Valkyrie. Built as a sanatorium in the late 1800s and early 1900s.
3. Devil’s Slide Bunkers on the coast of San Mateo County in California were high tech for the late 1930s concrete and steel observation pillboxes. The site was sold to a private owner in 1983.
4. Greenbrier Bunker. Secret location built to house Congress in the event of a nuclear war. Completed in 1961 and maintained by government employees working undercover as Forsythe Associates.
5. Nekoma Mickelsen Safeguard Complex. ND-radar system intended to find and destroy missiles launched at the U.S. Didn’t even stay in service for an entire year. The complex was deactivated on Feb. 10, 1976.
6. RAF Stenigot. Built for crazy long-range radar during World War II. Lincolnshire, England.
7. Titan I Missile Complex Eastern Washington. Dive 155 feet below the ground and you’d find three 1960s-built silos that once housed nuclear-tipped Titan I rockets.
8. Maunsell Sea Forts in Thames and Mersey estuaries were built to protect England from German submarines, decommissioned in the 1950s
