The only freestanding table rock formation east of the Mississippi.

This historic lavatory leftover features two levels of defecation stations completely without context.

Ornate limestone building now filled with geologic specimens, and more.

The largest historic preservation organization in the United States.

The first spinning jail built in the United States is the only one that still turns.

A pair of giant roadside arrows are all that remains of a former Route 66 trading post.

This Route 66 classic sports a giant fiberglass rabbit that you can ride.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

Legendary frontman of the Doors looms in this giant mural by famed Venice muralist, Rip Cronk.

An increasingly eccentric apartment building, topped with winged beasties.

A three-story, three-dimensional hobo clown in a tutu welcomes CVS shoppers.

Hundreds of trees made from glass bottles make up this forest on Route 66.

Everything you always wanted to know about borates is here.

Quite simply the largest tree in the world (by volume).

Nature's biggest mammal swims in landlocked Oklahoma.

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

A creepy sculpture of a decapitated head invites viewers to see St. Louis through its empty eyes.

Less a museum than a bizarre fantasy world created by artists and engineers.

The oldest operating Mississippi River–style steamboat still navigates the Ohio River.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

This abandoned Abraham Lincoln statue has also earned the honorary of "World's Ugliest."