Fernbank Museum is one of the best science museums in the Southeast. On any given weekday, you'll find curious adults and groups of school children touring the parts of the museum, looking at fossils and various exhibits. They also have an IMAX theater that plays two different movies each day. On Friday nights, I believe, they've started doing "Martinis and IMAX", aimed at a more mature audience, where they serve refreshments at the movie, and there is usually a jazz band playing in the museum area afterwards. Nice place for an intellectual date.