DH and I are planning to visit US next year. Haven't decided on dates, but perhaps June or September. Other than he has said he would prefer East Coast, it is all left up to me and I am completely baffled. DH likes train journeys so would like to work something into the trip. We like walking, so a national park perhaps... Interested in history, so some historical cities/towns. I don't mind doing some driving, but no massive motorways. Has anyone got any ideas?