Photo: Martin Falbisoner, CC BY-SA 3.0 Free landmarks in Washington DC
Photo: Martin Falbisoner, CC BY-SA 3.0 
Photo: Carol M. Highsmith, CC BY-SA 3.0 Library of Congress
Free at certain times
Photo: Martin Falbisoner, CC BY-SA 3.0 United States Capitol
Free at certain times
Photo: Greyfiveys, CC BY-SA 4.0 Washington Monument
Free at certain timesSupreme Court
Free, always
Photo: Brian Hamfeldt, CC BY-SA 4.0 Thomas Jefferson Memorial
Free, always
Photo: Rachel Hendrix, Public domain Martin Luther King Jr. Memorial
Free, always
Photo: Carol M. Highsmith, Public domain Franklin Delano Roosevelt Memorial
Free, always
Photo: Carol M. Highsmith, Public domain World War II Memorial
Free, always
Photo: National Park Service, CC BY 2.0 Vietnam Veterans Memorial
Free, always
Photo: Carol M. Highsmith, Public domain Kennedy Center Millennium Stage
Free, always
Photo: VeggieGarden, CC BY-SA 4.0 Union Station
Free, always
Photo: Carol M. Highsmith, Public domain Korean War Veterans Memorial
Free, alwaysAlbert Einstein Memorial
Free, always
Photo: (top)Cezary p(bottom)MattWade, CC BY-SA 4.0 White House and Lafayette Square
Free outside, paid inside
Photo: Duane Lempke, CC0 Washington National Cathedral
Free outside, paid inside
Photo: AgnosticPreachersKid, CC BY-SA 3.0 Dupont Circle
Free, alwaysNational Japanese American Memorial
Free, always
Photo: Famartin, CC BY-SA 4.0 Marine Corps War Memorial
Free, alwaysChinatown Friendship Archway
Free, always
Photo: ajay_suresh, CC BY 4.0 Ford’s Theatre
Free, always
Photo: Walter Smalling for the Historic American Buildings Survey, Public domain Frederick Douglass National Historic Site
Free, always
Photo: McGhiever, CC BY-SA 3.0 Mary McLeod Bethune Council House
Free, always
Photo: Eric T Gunther, CC BY 3.0 Dwight D. Eisenhower Memorial
Free, always
Photo: AgnosticPreachersKid, CC BY-SA 3.0 United States Navy Memorial
Free, alwaysNational Law Enforcement Officers Memorial
Free, always
Photo: ajay_suresh, CC BY 4.0