Known as "The Hill of the Little Devils."

Beating out all other concrete competitors, this massive garden feature's pointy hat has earned it a world record.

Enjoy a tour of oddities and makeshift monsters at this souvenir store with an offbeat sense of humor.

400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

Away from the crowds of fishing enthusiasts, take a hike deep into the woods and journey into an eerie darkness.

The only diamond mine in the world where you can keep what you find.

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

An adorably sweet display of sculpted Precious Moments figurines.

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

The Quapaw tribe supplies the meat and produce in this Oklahoma casino restaurant.

These elevated trucks were put in place as a middle finger to The Man, but are now considered folk art.

A Jurassic artscape composed of transmission casings and other mechanical parts.

Like Stonehenge, but with boats and oodles more charm.

A geological oddity formed by two rivers carving out a mass of limestone on both sides.

The only remaining Cold War–era Minuteman II missile control center in Missouri.

Outside the Missouri Quilt Museum, this large spool has more than one million yards of thread—and counting.

An abandoned concrete jungle surrounded by a lush park.

The first home of the doomed aviatrix Amelia Earhart.

The fastest mail service in the west is tracked and memorialized along this 1,400 mile trail.

Colorful Native American paintings are hidden within this small cavern.

A volcanic tunnel illuminated by natural skylights offers a shaded respite from the desert sun.

A mountain range on an active U.S. Navy base hides thousands of mysterious prehistoric rock carvings.