A precariously balanced rock perches on the edge of a cliff created tens of thousands of years ago by glacial erosion.

This waterfront museum in Maine is dedicated to the history of the smoked-herring trade.

A kitschy, creepy St. Louis mainstay.

The red brick house where the father of rock 'n' roll wrote some of his classic hits.

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

An abandoned factory along the Mississippi coated by a giant mural.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

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

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.

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.

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

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.

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

Man-made geyser that rises to the exact height of the Gateway Arch.

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

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.

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

An urban forest overtakes what was the greatest failure of utopic urban housing.

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