1. Ford's Theatre
2. Hay Adams Hotel
3. Octagon House
4. U.S. Capitol
5. White House
I am not going to go into details about why these are my favorite sites because many of them are featured in my Historic Haunts book series. Make sure you check them out; Historic Haunts Florida and Florida II, Historic Haunts of the South I, II, II, and Historic Haunts of the North I, and II.