L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.

Known as the "Cross At The Crossroads," this massive metal cross is just short enough to avoid the FAA.

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

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

In the St. Francois Mountains in the Ozarks at 1,772 feet above sea level, Taum Sauk Mountain is the highest (and possibly oldest) peak in Missouri.

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

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

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.

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

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

Entombed in this strange, white stone hill are the deadly remains of radioactive weapons production.

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

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

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

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

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

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

This is not your typical jungle gym.

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

This former small town was destroyed not by the motor oil it sprayed the ground with but by the toxic waste that was added.

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

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