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Beelitz Heilstatten Military Hospital. Famous as a set for The Pianist and Valkyrie. Built as a sanatorium in the late 1800s and early 1900s. Adolf Hitler was treated there during World War I.

Balaklava Submarine Base, Black Sea.  A base for submarines, also housed a series of tunnels that reached into the mountains top secret location.  It was designed and run by the Soviet Union.

Fort Ord.  Located 80 miles south of San Francisco, was used primarily as a training center for U.S. Army.  It contained an Olympic-size swimming pool and was completed in 1917.  It was closed and abandoned in 1994.

Fort Tilden established in 1917 in Queens, NY.  The platofrm pointed its cannons toward the sea to protect New York during World War II but was not needed. It was decommissioned in 1974.

Greenbrier Bunker.  Top secret location.  It was built to house Congress in the event of a nuclear war. Completed in 1961 and maintained by government employees working undercover as Forsythe Associates.

A top secret hexagonal structure in the middle of the Patapsco River, south of Baltimore. It was built in two years starting in 1848. It’s intended use is unknown.

Johnston Atoll. Now a National Wildlife Refuge deep in the Pacific. It encompasses over 800,000 square miles of ocean and was a site for nuclear testing from 1958 to 1975.

Maunsell Sea Forts. Located in the Thames estuary.  It was built to protect England from German submarines. It was decommissioned in the 1950s.

Nekoma Mickelsen Safeguard Complex. The ND-radar system was intended to find and destroy missiles launched at the U.S.  It didn’t even stay in service for an entire year. The complex was deactivated on Feb. 10, 1976.

RAF Stenigot. Built for crazy long-range radar detection during World War II in Lincolnshire, England.

Saint Nazaire Locks, France. Fortified locks built for German submarine protection. They are still in use today.
One of the Eight Blockhouse AntiAircraft Flak Towers in Berlin-Vienna and Hamburg Germany used during WWII.

Titan I Missile Complex, Eastern Washington State. Located 155 feet below ground are these three 1960s-built missle silos that once housed nuclear-tipped Titan I rockets.

Devil’s Slide Bunkers. Located on the coast of San Mateo County in California. These late 1930s concrete and steel observation pillboxes were considered to be high tech at the time . The site was sold to a private owner in 1983.
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