The thing that I liked most about Washington DC was the fact that it was free to go into the sites. It made such a refreshing change in a Capitalist society. The Smithsonian, the FBI building, Lincoln and Jefferson memorials and the Capitol were all magnificent sites to see. The Air and Space Museum was fantastic and I really liked the National Geographic Museum as well. Hope you enjoy the trip as much as I. I spent 9weeks travelling about last time, but found it easier to fly everywhere and only take short bus trips from the base areas.