This abstract sculpture is rumored to cast a hammer-and-sickle shadow once a year.

This bronze sculpture on a former squash court marks the secret origins of the Atomic Age.

The site of the first couple's first kiss is commemorated by the most adorable presidential monument ever.

This morbid, delightful curiosity shop offers everything from animal bones to human teeth.

An enormous park-like oasis, full of famous Chicagoans' graves.

Hot Doug's "Hot Dog" Stand.

A lush green oasis in the middle of Chicago.

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

A Bibliophile's Dream.

A speakeasy takes on Chicago's drinking culture.

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

A monument to the art of slicing people open.

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

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

These pretty kitties killed and ate as many as 135 railway workers.

The palatial McDonald's that inspired Wesley Willis.

Home to a protest movement, a bombing, and a dramatic change in labor history.

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

Once at the center of U.S. finance, the historic Trading Room was meticulously recreated piece by piece and rebuilt in the Art Institute.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

This historic hotel invented the chocolate brownie.

World's first "penitentiary," meant to be humane, drove men insane.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.