The deepest spring in Missouri.

An average of 33 million gallons of water pour out of the collapsed cave at the heart of this spherical spring.

The famous Beatle secretly visited this Illinois town several times to visit his sister.

Buy a token from the liquor store and you can make this beast spew flames on command.

The hometown of Popeye's creator is littered with a growing collection of granite cartoon characters.

Spanking machines, fake goats, and more devices of humiliation are on display in this museum of fraternal initiation devices.

Come for the heirloom-corn whiskey, stay for the wood hats.

This museum located in the "Corn Cob Pipe Capital of the World," chronicles the history of cob pipe.

Quirky water tower advertises the long-gone Brooks Tomato Products Co.

Fresh wooden posts have been added to ancient holes to recreate a primitive henge clock.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

This life-size bronze statue remembers the tallest recorded human in his Illinois hometown.

University City's quirkiest resident lives in a park named after its first.

A chessmaster's dream destination.

Speak to a companion on the other side of the room loud and clear through this architectural anomaly.

This is not your typical jungle gym.

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

After miraculously surviving a giant flood, the 19th-century nut tree and its offspring are protected with their own tiny park.

This museum looks at the history of one of America's most famous prisons and most beloved albums.

A ghost town in a remote corner of Oregon hosts a touching tribute to Sacagawea’s son.

When in Idaho, sleep in a giant potato.

A petroglyph map of the upper Snake River carved by prehistoric hunter-gatherers.

Birdhouses, peacocks, animal sculptures, and a graveyard are all found along this eclectic nature trail.

Where the famed daredevil attempted to launch himself across a canyon in a custom-built rocket.