Hi there! I'm originally from Columbus, IN, so Louisville wasn't a far drive for me. I thought I would list some things that I enjoyed in and around the Louisville area.
There is quite a large Irish settlement in Louisville, so if you like Irish pubs and cuisine, you're in for a treat. I particularly like the Irish Rover.

Some things you can do during the day:
Go for a cruise on the Belle of Louisville. It's a nice relaxing way to spend a few hours, and it's pretty inexpensive.

Something a little strange, but oddly fun is to visit the Cave Hill Cemetary. It's beautiful and there is a pond in the center of it. If you're familiar with Kentucky Fried Chicken, then you can visit the Colonel himself at his gravesite in this cemetary!

Churchill Downs - this is where the Kentucky Derby is run every year. You could see if there is anything going on during the time you are there. If not, you can always visit the Kentucky Derby Museum.

There is also the Louisville Zoo.

Hope this helps and have a good time in Louisville!

**hugs**