More than five miles of underground passageways.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

Better known as the "Body Farm," this unique research facility has been studying how human bodies break down since the 1980s.

All that's left of the quintessential "cabin in the woods."

Home of an evil witch famous within southern folklore.

Enormous lake at the bottom of a unique cave system.

A theater sits abandoned on Roosevelt Road, once majestic in splendor, now majestic in decay.

A century-old network of freight tunnels underneath the city's historic business district.

A chance to follow in the footsteps of the word's most legendary animator.

This titanic Catholic church in Chicago is also a refuge of the fictional cult-favorite wizard detective Harry Dresden.

The original Garfield station is the oldest station facility on the "L", with the station house dating from 1892.

No one knows how many bodies are in this vault in a Chicago public park.

An outdoor urban gallery of large-scale artworks by the world's most influential street artists.

Cemetery featuring rare glass-fronted columbarium.

A display of magnificent stained glass windows is the first exhibit of its kind.

Years of archaeology, just chillin' by the water cooler.

All of Chicago's wood-paved streets are long gone but two alleys remain.

A gothic church spire sits atop this skyscraper, the tallest church in the world.

Recognized the world over as the home of the McCallisters in the 1990 movie "Home Alone."

Urban explorers embraced America's now demolished first suburban mall, south of Chicago.

A historic beacon built in the aftermath of the worst maritime disaster on the Great Lakes.

Cold War missile launch site which has been converted to a public park.

Chicago's museum dedicated to the history of bondage and fetishism is more textbook than titillation.

Chicago's largest cemetery is full of beautiful Victorian monuments and more than a few ghost stories.