Rose Hill Manor
A hands-on children's museum with folks in period costume and "rural activities"
National Museum of Civil War Medicine
As it is the national museum, it's big, encompassing several locations, as well as a big presence at Antietam National Battlefield. The exhibits demonstrate how medicine was practiced during the Civil War which was a lesson in patient endurance, as well as track the leaps in the development of medicine during those times.
Barbara Fritchie House
A Civil War era Union patriot and close friend of Francis Scott Key, Barbara Fritchie is perhaps best known for flying the Union flag outside her house as General Stonewall Jackson marched by on the Maryland Campaign. In memory of this event, John Greenleaf Whittier wrote his poem Barbara Frietchie, lines of which Winston Churchill recited by memory during his visit to the city.
Monocacy National Battlefield
Site of a summer 1864 Civil War battle between General Jubal Early of the Confederacy and General Lew Wallace of the Union.