Pentagon building
Washington, DC 20301, United States Phone: +1 703 697 1776About
Pentagon , large five-sided building in Arlington county, Virginia, near Washington, D.C. , that serves as the headquarters of the U.S. Department of Defense , including all three military services—Army, Navy, and Air Force. There are 17.5 miles (28 km) of corridors, but, because of its innovative construction, it is possible to walk between any two points within the building in approximately seven minutes.
