Buildings (Military) These are military sites that are still standing and have not degraded into ruins. Battery Spencer, San Francisco, CA Sagamore Hill Military Reservation, Sandwich, MA Castillo de San Marcos Fort, St. Augustine, FL North Truro Air Force Station, Cape Cod, MA Ridge Battery, San Francisco, CA NY-56 Missile Control/Radar Site, Sandy Hook, NJ NY-56 Missile Launch Site, Sandy Hook, NJ WWII Submarine Observation Tower, Ormond-By-The-Sea, FL
