At Oklahoma Panhandle State University, a plaque marks a place once known as No Man's Land in the linear world and the fictional Kcymaerxthaere as well.

Is this 47.7-mile stretch of highway the longest straight road in the United States?

Over 50 historic windmills whir away at this outdoor museum.

The only remaining sod house Oklahoma built by a homesteader in 1894.

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

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

Site of the 1926 murder trial of Ernest Burkhart who was involved in the "Reign of Terror."

A tiny but mighty little pumper sits in the middle of the street, waiting for the next big oil strike.

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

The only fully-realized skyscraper built by the famed American architect, Frank Lloyd Wright.

This historic folk art garden contains a nightmare tower that claims to be the world's largest concrete totem pole.

The largest protected conservation area in the Ozarks—a region that stretches into northern Arkansas and southern Missouri.

Where hills of dirt conceal the burial ground of one of the most powerful ancient Native American societies.

Claims to be the "World's Highest Hill."

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

No matter what the plaque under this massive legume says, this is not the world's largest peanut.

Once the smallest park in the national system.

The world's only museum devoted solely to the art and collection of action figures.

The surprising home of the iconic Santa Monica Pier Ferris Wheel.

An old spiral fire escape dangles above a public courtyard in Midtown Oklahoma City.

After being abandoned for decades, Oklahoma’s first air-conditioned theatre was reborn in the new century.

This giant mimetic milk bottle has encouraged Route 66 travelers to choose dairy since 1948.

An immersive art experience built by local arts collaborative, Factory Obscura, in the building formerly known as The Womb, a psychedelic arts center founded by the frontman of the Flaming Lips.

Travel through the hidden underbelly of the city in colorful tunnels filled with art and history exhibits.