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

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

A kitschy, creepy St. Louis mainstay.

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.

Giant works of art interspersed throughout meadows and woodlands offer a new discovery at every turn.

The Magic House provides a beautiful and creative environment for curious youngsters to get their knowledge on.

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

The iconic remains of the original Academic Hall that burned down in 1892.

In a quiet north Chicago neighborhood rests a stunning relic of the golden age of earthenware design.

"No writer ever gave more to a city and got back less.”

The beloved home to all publications indie, erotic, and punky.

Not to be confused with the iconic New York City skyscraper, this Chicago building is a vibrant hub for artists.

A Bibliophile's Dream.

One of the last functioning antique elevators in Chicago.

These mansions date back to Chicago's days as a brewer's paradise.

Huge abstract sculptures of the Puerto Rican Flag.

A historic and oft-filmed prison stands in a Chicago suburb.

Over thousands of years, this slot canyon was carved out of the bed of an ancient lake.

This cairn in the shape of a woman has looked over a tiny Minnesota town for well over a century.

A remnant of the last Ice Age, this lake is surrounded by fascinating rock formations.

A bizarre house filled with an astounding array of collections.

This tiny site in Iowa, part of a patchwork national wildlife refuge, is home to ancient flora and fauna.

Home with Gothic windows featured in a famous painting.