The Arlington National Cemetery is visited by over four million people each year. Nearly one hundred graveside services are conducted each week, Monday through Friday. Originally, the site was not intended for a military cemetery when the Arlington House was built here in 1802, but rather a memorial to George Washington. During the Civil War, the house was inhabited by General Robert E. Lee. The property was confiscated by Mrs. Lee, and then appropriated for use as a cemetery. Today, current and former members of the United States Armed Forces are eligible for burial. A visitor's center has maps, guidebooks, exhibits and information to help navigate the more than 260,000 graves, including former Presidents, Astronauts, distinguished members of the military and other historical figures.

     Tours of the Pentagon are available by request. for groups of five or more. Tours last about sixty minutes and the length is around one-an-a-half miles. Since the Pentagon is the headquarters of the U.S. Department of Defense, there are a number of guidelines that are strictly enforced. These include no pictures, no electronic devices, and strict adherence to the scheduled time of the tour. Visitors must also undergo a thorough security screening, and those over eighteen must have two forms of photo identification. Bags such as backpacks and shopping bags are not allowed on the tour, and cannot be stored in the building. To request a tour, go to the website and proceed to the request a tour page. Tours must be scheduled at least two weeks in advance.