I lived in Nashville for 4 years before I went to see the Parthenon with family visiting from out of town and was totally blown away. A must see for anyone who is interested in Greek mythology, but what surprised me most was the artwork and Nashville history that I found. Learning how the Parthenon came to be in Nashville was a real eye opener and a look into Nashville's past. Plus there are always events going on in Centennial park, that make this a cool place to hang out. Watch for an art show to appear, admission is free during the time of the show.
Pros: good parking, great history, inexpensive
Cons: more guides