As someone who has visited the National Aquarium (in Baltimore) more times than I can remember (and I love it), the Georgia Aquarium was a whole different ballgame. The big tank in B'more doesn't even have real coral in it, so to see real coral, even if it is just starting out, was incredible. Plus the Georgia Aquarium has some really interesting exhibits. I loved their garden eels and their huge crabs (what type of crabs were they? Its been a few years now.) And I was psyched that I didn't have to go to Japan to see a whale shark. I really liked the potato groupers, too. Some very cool stuff.