1. American Art Smithsonian
    Gotta see the big neon map of the U.S.
  2. Going to the top of the Washington Monument
  3. National Gallery of Art
    The light show/moving walk way between the two wings is pretty awesome. And once I saw Chuck Close in the flesh there!
  4. The Newseum
  5. The Capitol
    Especially if you can con a staffer into taking you on the underground trolley.