The 444-mile Natchez Trace Parkway, which begins in Natchez, Mississippi, and ends in Nashville, is one of America’s most iconic roadways—not just because of its current attractions but because of its history as an ancient dirt trail along which Native Americans walked. The speed limit is an easy 50 miles per hour, meaning you must take the time to savor the sights as you navigate the parkway’s dips and bends.