If you're into crafts, check out Berea (I-75 exits 76 & 77). They have crafts stores everywhere. There is also a nice hiking trail at Berea College Forest just 5 miles off I-75.
Berea - Home
Berea College Crafts - Online Catalogue (http://bereacc.stores.yahoo.net/ - broken link)
Cumberland Falls is also located just off I-75 near Corbin. It is the 2nd largest waterfall in water volume in the US.