Glasgow Army Airfield Norden Bombsight Storage Vault
The Glasgow Army Airfield Norden Bombsight Vault was listed on the National Register of Historic Places in 2011. It is a one-story 16.5 by 13 feet (5.0 m × 4.0 m) concrete shed with an 11 by 6 feet (3.4 m × 1.8 m) projection that has 8 inches (0.20 m)-thick walls and a poured concrete floor.
Source: Wikipedia — Glasgow Army Airfield Norden Bombsight Storage Vault (CC BY-SA 4.0)