One tip to travel America- Travel in Amtrak, the countrywide rail service which is immensely comfortable and fast. One of the major highlights of our trip was the train journey From New York to Richmond, Virginia. If you are into travelling small towns and exploring small lanes and streets, cafeterias, local pubs and festivities Richmond is a rich place. It offers a tranquilizing spirit in it's environment and air.
Washington DC is a regal place if you are lucky enough to see the museums and not get caught in U.S. Govt shutdown. We were there. And it wasn't pretty. I peeked in and could just see the tusks of the mammoth in the Museum of Natural History. Washington DC is architecturally amazing and very easy to travel. We relied completely on our feet to carry us around and we saw so much more than we could on a sight-seeing bus.