A cannon designed to fire an atomic warhead.

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

The first home of the doomed aviator Amelia Earhart.

A whimsical monument marks the highest point in Kansas, not that you could tell by the looks of it.

A 20-foot-tall egg painted in a traditional Czech patterns by the Czech community in Wilson, Kansas.

Curious rock formations in a tiny Kansas state park.

It's big, it's a ball, and it's made of twine—the world's largest of its kind.

A landscape of massive spherical boulders are the main attraction in this Kansas State Park.

Small plaque marks the spot, but the true center is located about half a mile away on a private pig farm.

Marking the spot where a conquistador gave up his search for the fabled Seven Cities of Gold.

The United States's largest hand-dug well is topped with a state-of-the-art museum.

Massive still life just off the highway in Kansas.

A wonderful collection of all things Oz is nestled in the heart of Kansas.

One of the Eight Wonders of Kansas and the first official National Natural Monument these stark formations look like nature's Stonehenge.

An Oklahoma museum that celebrates the history of the "Mother Road."

A 50-foot-tall replica of the infamous lamp from 'A Christmas Story' illuminates this small town.

The modest childhood home where the baseball legend and Yankees star learned to hit from both sides of the plate.

Final resting place of Geronimo, Quanah Parker, and the first atomic gun ever fired.

The highest point in Oklahoma used to be a lawless outlaw's paradise.

A detached cement mixer has been transformed to resemble a relic from some obscure NASA mission to Oklahoma.

When you can afford only half a road, you build only half a road.

A large stone map of Arkansas awaits visitors to its highest point.

The smallest covered bridge in Maryland.

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.