A museum celebrating the Victorian obsession with hair art.

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

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

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

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

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

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

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

The history of the treatment of mental illness, illustrated in all its gory detail, and housed in an asylum.

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

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

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

The history of funerals and funerary customs.

Once known as the Illinois Asylum for the Incurable Insane.

The palatial McDonald's that inspired Wesley Willis.

The oldest experimental corn field in America is still creating better ways to grow crops.

A historic and oft-filmed prison stands in a Chicago suburb.

One of the few remaining relics of the meatpacking hub that made Chicago the "hog butcher to the world."

A towering Art Deco movie palace made to look like a Mayan temple.

Assemble a masterpiece at the first and only North American school exclusively dedicated to mosaic art.

With 8,000 pipes this giant instrument is the most versatile theatre pipe organ ever built.

This awkward aquarium sculpture is one of the strangest statues in Chicago.

The only place in America where anyone who wants can shovel coal aboard an antique train.

Built in 1869, this now-retired structure looks more like a medieval fortress than a county lock-up.