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An underground passage with historical exhibits leads from the Capitol Building to one of Washington's little-known places to visit, the Library of Congress.

Near the Smithsonian museums, the United States Holocaust Memorial Museum documents, studies, and interprets the history of the Holocaust with the dual purpose of memorializing the victims and helping the world to confront hatred and prevent genocide.

Also part of the Smithsonian Institution and located on the mall are the two museums that comprise the National Museum of Asian Art.

Housed in two separate buildings connected by a tunnel, the National Gallery of Art is one of the world's premier art museums and one of the most popular in the U.S.

The National Air and Space Museum is one of the world's most popular museums, with a collection of history-making air and spacecraft that includes the original 1903 Wright Brothers Flyer and Charles Lindbergh's Spirit of St. Louis, the first plane to fly solo across the Atlantic Ocean.

The 555-foot white shaft of the Washington Monument is a familiar icon of the National Mall, and a beautiful sight, especially when mirrored in the long Reflecting Pool at its foot.

The White House is the official residence of the President of the United States.

If you look at a Washington, D.C. attractions map, you'll notice that many of them line the National Mall, so you're likely to spend a lot of time here.

The spacious swath of lawns and pools that form a wide greenbelt from the Capitol Building to the Lincoln Memorial is also the site of many of Washington's landmark buildings and monuments.

Martin Luther King Jr. delivered his famous "I have a dream..." speech from the memorial steps in 1963, again making history here.