Time permitting, take a thirty minute drive to Smyrna; visit the Sam Davis house/museum.

IIRC, Tennessee is second, only to Virginia, for the number of Civil War Battlefield sites.
If interested, do some searching online to develop an itinerary that will suit your plans.

Two gastronomical delights of the region that should not be missed:
'Chess Pie' and a sandwich called 'The Kentucky Brown.'

Unless they have cleaned-up that part of town, the Ryman Auditorium,
birthplace of the 'Grand Ole Opry,' is in an area I would steer clear of after dark.