Bronze statue marks the spinach capital of the world.

The first commercial phone line west of St. Louis was installed thanks to a group of Cherokee businessmen.

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

An adorably sweet display of sculpted Precious Moments figurines.

This highway overpass was named after the tragic disappearance of a young mother who got mixed up with the wrong people.

The largest land animal skull ever discovered.

A historical house furnished with authentic pieces from the Victorian period.

A small section of native wilderness on a university campus

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

This museum houses artifacts from American adventurers and filmmakers Martin and Osa Johnson.

This unusual sculpture honors the city's namesake, Octave Chanute, for his pioneering work in early aviation.

An acoustic anomaly with a mysterious cause sits in the heart of Tulsa.

The Bucyrus-Erie model 1850B electric shovel, or "Big Brutus," the largest existing electric shovel in the world.

This statue is an ode to an iconic roadside advertisement popularized during the 1970s.

This former mining town was named the most toxic town in America.

Three markers installed over the course of 140 years mark the point where Arkansas, Missouri, and Oklahoma converge.