An abandoned concrete jungle surrounded by a lush park.

Like Stonehenge, but with boats and oodles more charm.

A kitschy, creepy St. Louis mainstay.

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

The oldest bar in Missouri is hidden within a limestone brewery cellar more than 50 feet underground.

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.

A subterranean haunt where wine and homemade biscottis are always on the menu.

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.

The show pony of cave systems, Fantastic Caverns manages to live up to its name.

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

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

European castle ruins in an American state park are actually the product of death and grief.

The "World's Largest Underground Business Complex," a 55,000,000-square-foot city underneath Missouri.

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

If there's another drive-through golf-cart bar in a bat-filled cave on top of a mountain, we don't know about it.

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

This abandoned prison castle has become an imposing gallery of graffiti art.

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

A former Canadian automobile ferry mysteriously appeared in the Black River 20 years ago, and now it quietly rusts away.

Old car parts and assorted materials get turned into one man's mechanical treasures on the side streets of Cleveland.

Superfans of The Shawshank Redemption can take a driving tour of most of the films real locations.

Small, privately owned island divided between Michigan and Ohio with abandoned vacation homes and a derelict lighthouse.

A real flying saucer, contracted by the U.S. Air Force.