The Pentagon

http://pentagontours.osd.mil/

Arlington National Cemetery

http://www.arlingtoncemetery.mil/

Lincoln Memorial

http://www.nps.gov/linc/index.htm

Washington Monument

http://www.nps.gov/wamo/index.htm

Vietnam Veterans Memorial

http://www.nps.gov/vive/index.htm

World War II Memorial

http://www.nps.gov/wwii/index.htm

National Museum of American History

http://americanhistory.si.edu/

U.S. Capitol Building

https://www.visitthecapitol.gov/

Martin Luther King Jr. Memorial

http://www.nps.gov/mlkm/index.htm

Thomas Jefferson Memorial

http://www.nps.gov/thje/index.htm

National Mall

http://www.nps.gov/nama/index.htm