I used to live in Columbia, SC and I have been there once before for a european car show. Unfortunately when I was there they weren't giving plant tours, but now they are again. The Zentrum is a miniature version of the BMW museum in Munich. It has all sorts of cars from a Dixie to a pre-war 328 to the late seventies artcars and it even had a E30 M3 touring car when I was there, although the displays do change periodically. All in all it is a very cool place.
"The Shaggin' Wagon"
F@$%ing Automatic 4-speed