The building consists of five concentric rings connected by ten corridors that run, like spokes, from the inner ring to the outer. Interior courtyards that provide light separate the rings.
The corridors are a total of 17.5 miles long, while the building provides a gross floor area of 6,500,000 square feet. There are 3,800,000 square feet for offices, concessions, and storage. The five-sided center courtyard covers five acres.
A shopping concourse, numerous snack bars, cafeterias, dining rooms, banks, a subway station, and a bus platform make the Pentagon "a city within a city."