My expectations for this attraction were exceeded.
First, I'll admit that I didn't appreciate how the Parthenon would impress even more when it's an actual building (a faithful full sized replica in this case) than it does in photos and videos.
What made the visit far more memorable was the documentation of the building of this Parthenon for the Tennessee Centennial. The state had an impressive level of culture early in the last century.
As you make your way through the lower floors of the building--a feature not present in the original, made possible by modern construction methods--you pass through the gift shop to pay admission (it's a bit ill managed, people crowding in and making it hard for shoppers to get around). Then you make your way around corridors with the history displays. On the next level is an art gallery with their permanent Cowens collect of modernist American paintings and a couple of special exhibits. One more floor up and you're in the Parthenon with the impressive attempt at re-creating the 30 foot statue of Athena, and their collection of castings of some of the surviving sculpture from the Parthenon.
If they follow these reviews--one suggestion. We wound up confused about where to enter and tried going up the front stairs--a difficulty for us, seniors with iffy knees. Could there be some signage next to the parking lot pointing to the public entrance? And for thoser of us who wander up the steps--it's nice that the architects installed a flight of smaller, shorter steps so we weren't almost mountain-climing down the enormous originals--but could we also have hand-rails? Thanks.