Natchez Trace (Mississippi and Tennessee)
Credit: Alamy

Travel along the Natchez Trace Highway from Mississippi, grazing the edge of Alabama, and diving into Tennessee, and you'll be treated to 444 miles of scenic bliss that culminates in the cultural and musical gem that is Nashville, Tennessee. Though you may be tempted to blast through the Natchez Trace Parkway's more than 51,000 acres, remember that the National Park Service strictly enforces the 50 mph speed limit, making this ride more about smooth than fast.