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

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.

The first car-centric shopping plaza in the U.S. brought a little bit of Spain to downtown Kansas City.

Famous church recognized for both its unique design and disciplined monks that live according to the Benedictine discipline.

One of few surviving standpipe water towers in the U.S.

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

A gem in the small Missouri town where Winston Churchill coined the term "Iron Curtain" and effectively began the Cold War.

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

The first rural cemetery west of the Mississippi is home to the elaborate tombs of St. Louis' local beer barons.

A chessmaster's dream destination.

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

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

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

Two hundred tons of pioneer artifacts were painstakingly recovered from a shipwreck at the bottom of the Missouri River.

Giant granite rocks standing end-to-end like a train of circus elephants.

What was once a presidential estate is now an exotic menagerie and home to the Budweiser Clydesdales.

This is not your typical jungle gym.

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

Community bookshelf of 25-foot-tall book spines.

Erosion and time have created a naturally-formed water park.

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

Once an ambitious nature spa, these forest ruins now provide a serene monument to failure.