The Zoo is really nice. It has a carousel, and a new splash park called like Glacier Bay or something, but I haven't been since it opened. Er, I think it's open.
Louisville has some awesome historic homes, too, if you're into that. It just really depends. Lynn's Paradise Cafe is fun and funky, and there are boutiques and things within walking distance of that.
One place I love is Falls of the Ohio state park, which is actually across the river in Indiana. You can walk out on the fossil beds, and they have a really neat visitors center and movie that talks about the prehistoric origins of the area.
If you're into antiquing, I really like the town of Shelbyville for that. Main St. Shelbyville has some really nice dining options, quite a few antique stores, and that small-town southern feel. Shelbyville is about a 30 min. drive from Louisville.
If you have a car, Pleasant Hill Shaker Village is a fun trip, too. It's about an hour and a half I think, but it's a "living" Shaker village, where you can tour buildings and watch craftsmen in action. They have a terrific restaurant on site that uses locally-grown food.
Woodford Reserve out near Lexington is a great tour, too. I think it's around $10 pp, but you get a shot of bourbon at the end and all the bourbon balls you can eat. Yum.
As you can tell, Kentuckians love to welcome visitors... I'm perpetually trying to get all my friends to move here. I grew up here, and returned back in 2007 after a long stint living up north (not in Indiana - LOL - Massachusetts). I wouldn't live anywhere else. Louisville just has this amazing blend of southern hospitality and down-home feeling with all the arts opportunities of a bigger metropolitan area. There's also a burgeoning slow food/sustainable agriculture movement here, and we have an incredibly wide array of awesome restaurants from pretty much all cultures I can think of.
If you'd like more specific information, PM me and I'm happy to help you plan

I loooooove to show off my state!
