One of the world's earliest skyscrapers.

A plaque on the side of a parking garage marks the burial place of a great Ottawa chief.

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

A kitschy, creepy St. Louis mainstay.

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 mosaic-covered bar is brimming with curated curios.

A historic house in St. Louis was plagued by a series of suicides committed by family members involved in a successful brewery.

A big museum full of little worlds.

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

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

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

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

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

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

You have to love a museum with a truly dedicated focus. A focus on Superman, for example.

An enormous natural sandstone bridge in Kentucky.

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

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

The "Jade Museum" is full of thousands of intricately carved works of art made from various precious stones.

This award-winning men's bathroom was just too beautiful to not allow women to see.

This museum of miniature displays provides a journey through early American history.

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

A theme park featuring a replica of Noah's Ark built to the measurements specified in the Bible.

An art deco ice cream shop covered in vintage train station tiles.