This unusually circular centenarian barn became a Route 66 icon.

The fifth tallest statue in the United States is a shirtless monument to the oil worker.

To honor his gardening wife, this yard artist turns bowling balls into playful, colorful sculptures.

Behind the Cowboy Hall of Fame is a burial ground for good horses and a famed rodeo bull.

An oil baron's wild paradise and the winner of an ill-fated air race.

A museum honoring Oklahoma military service, where you can look into Hitler's mirror and see a Mickey Mouse gas mask.

One believer transformed a local curiosity into proof of Vikings on the Great Plains.

The final resting place and once home of the Bandit Queen of the West.

Nature's biggest mammal swims in landlocked Oklahoma.

An acoustic anomaly with a mysterious cause.

Visitors can walk over the largest concentration of Columbian mammoths to have died from one event.