Chattanooga:Tennessee Aquarium (world class) Rock City, Ruby Falls, Tennessee Valley Railroad Museum (trains used in movies like "Water For Elephants" and music videos like "Long Black Train") Chattanooga Choo Choo Hotel.
Lyinchburg: (between Chattanooga and Nashville) Jack Daniel's Distillery (free tour and all of the lemonade you can drink)
Nashville: Grand Ole Opry, Loveless Cafe, Antique Archaeology store (American Pickers TV show) The Gulch (Nashville downtown entertainment district)