Army Navy Drive and Fern Street
Arlington, VA 22202
+1 703 697 1776
Across the Potomac River in Arlington, Virginia is the headquarters of the armed forces of the United States, the largest office building in the world. Encompassing 29 acres, with a five-acre courtyard in the center, the five-sided structure has over 17 miles of hallways. Approximately 23,000 employees, military and civilian, come to work here each day. Group tours are available to Pentagon with a reservation.