Named for the 39 tribes that live in Oklahoma, this restaurant's menu deliciously highlights local flavors.

A time-capsule monument reminding future generations of the importance of efficient and effective use of natural resources.

This constitutionally sound Muffler Man harkens back to the days these attractions were a must-see.

A museum and apothecary garden devoted to the history of frontier medicine.

This volcano rises like a giant anthill from the plains below, with a road spiraling up to the rim.

This unassuming layer of clay boasts an out-of-this-world origin story.