Natchez Trace Parkway, Mississippi/Tennessee
The original Natchez Trace was a roadway that connected the frontier settlement in Tennessee, Kentucky and the Ohio Valley with the lower Mississippi River. It is famous for its landmark double-arched Natchez Trace Parkway Bridge, made of concrete, that spans a heavily wooded forest.
Million Dollar Highway, Colorado
A spur of US Route 550, this highway connects Silverton and Ouray in Colorado. True to its name, there are a million-dollar sights to behold when you drive this road - from resplendent fields of wildflowers to never-ending stretches of terrain dotted with green pastuers.