National Mall
There are many places very close to the Mall.  The Library of Congress and the United States Supreme Court building are just east of the Capitol.  The White House, the National Archives, the Old Post Office, and, Ford's Theater (where Abraham Lincoln was killed) are just north.  The National Postal Museum, and Union Station are northeast. The Jefferson Memorial, the Franklin Delano Roosevelt Memorial, the United States Holocaust Memorial Museum, and the Bureau of Engraving and Printing are to the south.