Quirky water tower advertises the long-gone Brooks Tomato Products Co.

The mysterious white squirrels of this Illinois city are treated like sacred cows.

Tour the luxe "glass cage" that inspired and unnerved the architecture world upon its debut.

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

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

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

Taxidermy, Cigar Store Indians, A Model of a New York Tenement and Delicious Draft Root Beer.

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

First planned industrial community in the United States.

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

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

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

Cemetery featuring rare glass-fronted columbarium.

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

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

A European-style bath house in Chicago.

This historic hotel invented the chocolate brownie.

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

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

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

What was once one of the country's largest confectionary plants is now an abandoned ruin, but is still pretty sweet.

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

What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.

The only Bahá'í house of worship in North America and one of only a handful worldwide.