I spent a day in D.C. once, on my way to New York, I visited the meuseum of American History, spent a lot of time in the cars section, Vietnam memorial, lincoln memorial, some other places, took some really stuffty pictures, bought a Gatorade, I then got a bleeding blister on my foot from walking, so we took a taxi over to that cemetary in Arlington, VA, then went to New York.
That was my entire DC trip pretty much lol
T'was a good experience. I would definitely go again.