Nice side trip, but too much development
Stones River National Battlefield is a sizable national park about 30 minutes south of Nashville. If you are in the area, it is worth the visit. They have an informative visitor's center (along with a well provisioned gift shop), a small driving tour, and excellent park rangers. My biggest complaint isn't what is at Stones River, but what isn't. Within the park boundaries I believe there should be far more interpretive signs and displays. And, alas, nearly half of the actual battlefield is not part of the park, but buried under modern developments. The morning portion of the first day of the battle where the Confederates launched their surprise attack is not included within the boundaries of the park, and therefore the average person does not get a real sense of the size and importance of Stones River.