Go!! It's my favorite, even more so than the GA Aquarium. I drive more than 2 hours to get to it. I'm really into freshwater, and the TN has the largest freshwater collection (I think?). And they're really beautiful too. They've got a neat Rivers of the World exhibit and you can see all your favorites in there. Much bigger than you'll ever see in a home aquarium. 8O And they have an awesome tank with pacu and arapaima and redtail cats. And the whole layout is really neat. And I could go on, but I'm saying it's worth it.
They have a new addition with more saltwater and a butterfly garden that I think they threw up to compete a little with the GA Aquarium. It's kinda neat, but not the best part. I did like the petting tanks in it though.
So, go! And take pics for us!