Cheesy, but fun, near Orlando:
You Drive Airboat:
http://www.theotherorlando.com/conte...4/airboat.html
Ice Bar Orlando:
http://www.icebarorlando.com/
Gatorland:
http://www.gatorland.com/
Back to Nature:
Ocala National Forest. Hiking, canoeing, kayaking:
http://www.fs.usda.gov/ocala I especially like Juniper Springs.
A bit of Old Florida:
Cedar Key - on the west coast, west of Ocala:
http://www.cedarkey.org/
St Pete has a revitalized downtown, some great restaurants and bars. Salvidor Dali Museum is there. Then you could run down to Sarasota and visit the Ringling Museum, if into art.