Rare & Historic “Hard Assets” Acquisition & Sales of Missile Bases & Underground Structures Acquisition & Sales of Missile Bases & Underground Structures Engineered by the Department of Defense, hardened against a nuclear event with earth-contact and tons of steel and concrete, they are some of the strongest structures ever constructed. They were each built at the cost of millions of taxpayer dollars. Bringing new meaning to the word "shelter," missile bases and bunkers are built to stand the test of time. They will offer privacy, security and functionality for generations to come. We consider these underground fortresses the 20th Century’s counterpart of the fortified castles of Europe, hence our business name, 20th Century Castles, LLC. If you are seeking a worthy investment, these highly sought after “hard assets," certainly continue to appreciate in value. They are rare, collectable real estate and represent a multimillion dollar head-start on any retrofit project. Particularly given the current economic, geopolitical, and environmental conditions, investing your money into such a structure can create long-term value. Can you envision one of these hardened structures in your future? We can make it happen.