We are attending a convention at the Gaylord starting Monday night the 29th. We (myself, husband and 15 yrs old daughter) will have spent several days in DC as well as Philadelphia prior to this day. My husband is a pilot and his absolute must is the Udvar-Hazy Air and Space Museum. We plan to spend Sunday night at a hotel near Dulles so that we can get to the museum right when they open at 10am. We will probably spend 2-3 hours there (I can only take so much air museums). We will have a rental car we are returning to the Gaylord by 4pm.
I am looking for suggestions on other things to do in this area or within driving distance for that afternoon. We have been to DC before and gone to Mt Vernon and Arlington. We are huge history buffs.
Also, if it would be more helpful what TA forums might be helpful to list ideas