Since I have never seen the Gettysburg cyclorama in person, I would have to go with Atlanta... Ross is right about it being hard to imagine the battle sans all the urban sprawl. One of the neatest things I have ever done was when we did a LH at the Atlanta Cyclorama, at had the chance to walk on the floor of the diorama. That was pretty cool. One year at the Battle of Atlanta, they had "set dressings" on the battle field, the RR tracks, wagons and Truop-Hurt house, and that was kinda neat.
Co A, 2nd Battalion Ga Sharpshooters/64th Illinois Vol Infantry "Yates' Sharpshooters"
Savannah Republican Blues
Co C, 3rd US Infantry
Ships of the Sea Maritime Museum & William Scarbrough House, Savannah, GA
"I hope to live long enough to see my surviving comrades march side by side with the Union veterans along Pennsylvania Avenue, and then I will die happy." - James Longstreet at a Memorial Day Parade in 1902.