Notable attractions include the world's largest museum complex, the Smithsonian Institution, the National Archives, the US Holocaust Memorial Museum, the Library of Congress, the Vietnam Veterans Memorial, the Kennedy Center, and The White House. The US Capitol is the geographic center of the District's streets. The city is divided into four quadrants, NW, NE, SW, SE, and the dividing lines of each quadrant are North Capitol Street, South Capitol Street, East Capitol Street and the National Mall. North-south streets are numbers. East-west streets are letters in alphabetical order.
Diagonal streets have state names and are avenues.
Circles and squares occur at the intersections of diagonal avenues and numbered and lettered streets.