The Hermitage is a rather popular tourist/road trip/field trip destination 20 minutes from downtown Nashville TN, with its own welcome center, food court and snacks, exhibits, events and tours. It's open from 9-4 in the off season. General admission for an adult is $20; kids are $10 each and a family pass is $54. Admission includes a museum exhibit pass, guided tour of the house and a self-guided audio tour of the grounds, which you can stroll through at your own leisure.
The guided house tour was very quick, in my opinion. We were given a memorized spiel about each room, asked if we had any questions, and then shooed on to another tour guide waiting in the next room. We also (understandably) weren't allowed to take pictures, but that's okay because you can find them online... I mean, in case the tour goes so fast that you forget what the house looked like.
The Hermitage was definitely built to impress, inside and out.
This is a fun stop if you're in or around Nashville TN and like history.