The world's longest known cave system.

A hillbilly theme park that proved so unpopular the land wouldn't even sell on eBay after it closed.

The show pony of cave systems, Fantastic Caverns manages to live up to its name.

A 35-foot-tall fork stuck in the ground outside an office building in Missouri.

This monumental Jesus is often referred to as "Our Milk Carton With Arms."

The Ozarks' strangest dwelling.

An extravagant western hotel where every floor is the "ground floor."

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

This century-old roadside attraction is full of bizarre rock formations.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

An acoustic anomaly with a mysterious cause.

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

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

Nature's biggest mammal swims in landlocked Oklahoma.

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

A whimsical tower with a spiral staircase, inspired by the Space Age and the Möbius strip.

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

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

A mysterious light of unknown origin on the backroads of Missouri.

Collection maintained by the legendary designer.

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

This historic theater's pipe organ still accompanies silent films just like it did in 1929.

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

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