 Spring through fall. Spring bloom occurs in April and May; fall foliage peeks from mid-October to early November. Built in the late 1960s expressly for grand views, this two-lane highway ripples over the gentle Ouachita Mountains along the border of Oklahoma and Arkansas. Evergreen and deciduous trees shoulder the road, the latter making for gorgeous floral displays in spring and brilliant color in autumn.

 Here's the auto tour you've been waiting for, where a winding mountaintop drive opens a showcase of ... (more)