World's second largest particle accelerator, where nature reveals its secrets.

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

Its eclectic exhibits range from the world’s first motorcycle to Luke Skywalker’s Land Speeder.

A small abandoned and abused cemetery that has become a magnet for ghost hunters.

To find the "unicorns of the deep" you've got to go downstairs.

A strange and haunting monument of unknown origin in the historic Graceland Cemetery.

You can take a class, browse the library, or visit the lavish lair of an international men's humor society.

What was once the second largest steel mill in the US is now a sprawling complex of modern ruins.

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

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

One of the largest pieces of scientific equipment ever carried on a NASA space shuttle sits in a Chicago alley.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

In a quiet north Chicago neighborhood rests a stunning relic of the golden age of earthenware design.

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

This modest post office sits on the site of H.H. Holmes' famous murder castle.

A little-known subterranean street runs under some of the best-known buildings in Chicago's River North.

A hot dog stand where the heads are just as hot as the dogs.

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

This surprising gem is a world-class archeological museum hidden at the University of Chicago.

This alley in downtown Chicago held the bodies of over 600 people after the fateful Iroquois Theatre fire.

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

This historic hotel invented the chocolate brownie.

The beloved home to all publications indie, erotic, and punky.

A haunting statue called "Eternal Silence" has quite the reputation among visitors with active imaginations.