The Pentagon

　　    United States – Headquarters of the Army, Navy, and Air Force, named for its distinctive pentagonal shape. Built during World War II, it is renowned as the world’s largest office building, accommodating 25,000 employees. Its unique design ensures that it takes no more than seven minutes to reach the farthest point from any location within. The interior is not open to the public. On September 11, 2001, a terrorist air attack resulted in 184 deaths.     Transportation     Metro: Take the Yellow/Blue Line to the Pentagon Station
　　    Address: 1000 Defense Pentagon, Hwy 1-395, Arlington, VA    Tickets / Opening Hours     Visits: Apply in advance through a member of Congress

　　     Washington, D.C., United States