A subterranean haunt where wine and homemade biscottis are always on the menu.

The world's largest man-made underground caverns offer unparalleled underwater wonders.

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

In a historic steel foundry east of the Mississippi River, thousands of wooden crates hold the architectural remnants of buildings long gone but not forgotten.

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

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

This unassuming riverbank is Missouri’s first designated site in the National Underground Railroad Network to Freedom.

What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

First known as the "Sample House," this construction mash-up was meant to be a living catalogue of building styles.

A mythical bird etched into the face of a rock doubles as the mascot for a nearby school.

A late sculptor's last project was to turn this abandoned cement factory into a castle-themed amusement park.

In an alley not far from where two great highways meet, byways of a very different sort are honored.

A replica viking ship from the Chicago World's Fair is still in dry dock in an Illinois park.

Arguably the best example of an authentic Dutch windmill in the United States, rivaling its counterparts in the Netherlands.

World's second largest particle accelerator, where nature reveals its secrets.

In a grove of fast growing walnut trees outside Paris, Illinois, a marker shares the story of a fictional road building culture.

One of the first historical sites of an alternative universe was installed in the town of Paris, Illinois—which is now home to an annual spelling bee of Kcymaerxthaereal words.

Tour the luxe "glass cage" that inspired and unnerved the architecture world upon its debut.

This national park dedicated to the tallgrass prairie ecosystem still displays its military past.

The multinational Burger King chain is banned from operating within 20 miles of a family restaurant filed under the same name.

A small obelisk commemorates the launch site of the world's first liquid-fueled rocket.

Eclectic collection of rare and beautiful stones in a historic home.

Curious cave that stays a cool 56 degrees all year long.

Like Stonehenge, but with boats and oodles more charm.