The romantic botanic tunnel feels like a well-kept secret.

This small shop walked so America could run on Dunkin'.

This ostentatious Italianate palace of an Oklahoma billionaire is filled with several themed mini-museums.

A larger-than-life monument to the overlooked women who braved Western expansion and broke down societal barriers.

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

Nature's biggest mammal swims in landlocked Oklahoma.

These massive mitts are made of 30 tons of devotional bronze.

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

The collection is housed in an exquisite mansion that makes you feel like you've been transported to an Italian villa.

A former chicken restaurant that doubled as a speakeasy is now a quirky home full of wonderfully strange traditions.

One of the best examples of Art Deco architecture in the United States.

An acoustic anomaly with a mysterious cause.

A half-size replica of the World Trade Center towers above Tulsa.