Destroyed by flood waters, prison now serves as a training ground for armed forces.

One of the world's earliest skyscrapers.

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

This recently restored timepiece has stood all around Kansas City.

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

A chessmaster's dream destination.

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

Another in a long tradition of legends regarding infernal seats.

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

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

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.

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

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

This is not your typical jungle gym.

A geological oddity formed by two rivers carving out a mass of limestone on both sides.

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

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

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

These huge glacial erratics are humorously named after a much much smaller bird.

Whimsical woolen creatures have taken over this historic Northern Ireland park.

Northern Ireland's church-turned-skate park.

A meandering boardwalk across the bogland leads to a "stairway to heaven" with sublime views.