Huge abstract sculptures of the Puerto Rican Flag.

These chunky stone towers out in Lake Michigan are the key to Chicago’s drinking water.

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

Illegal drag racing two stories beneath Chicago’s streets.

Not to be confused with the iconic New York City skyscraper, this Chicago building is a vibrant hub for artists.

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

Once called the "Polish Gold Coast" it is an icon of the neighborhood that bears its same name.

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

The final resting place of up to 6,000 Confederate soldiers, the largest mass grave in the Western Hemisphere.

You have to love a museum with a truly dedicated focus. A focus on Superman, for example.

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

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

Where Cusack's record store from the film "High Fidelity" was located.

A beloved Chicago music venue offering cold beer and lots of “Friendly."

First planned industrial community in the United States.

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

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

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

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

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

River pirates, murderous bandits, and serial killers used this Illinois cave as their debauched hideout.

This historic hotel invented the chocolate brownie.

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

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.