The only arched bridge made of stone on the entire Mississippi River.

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

The palatial McDonald's that inspired Wesley Willis.

One of the few remaining relics of the meatpacking hub that made Chicago the "hog butcher to the world."

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

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

One-of-a-kind preserved ruins of an abandoned 1880s church in Chicago's Pilsen neighborhood.

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 cheerfully-named branch of the Chicago River is the fetid result of years of blood, entrails, and meatpacking waste.

These abandoned grain silos and tunnels are an urban exploration dream.

This urban drawbridge gained eternal pop culture fame when the Blues Brothers jumped it while it was raised.

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

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

First planned industrial community in the United States.

In one Chicago park, a trio of werewolves are waiting to devour their fallen brethren.

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

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

Former meatpacking facility turned vertical farm and sustainable business complex.

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

This historic hotel invented the chocolate brownie.

This museum celebrating the almighty dollar lets visitors literally stand in the shadow of a million bucks.

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

A century-old hotspot for jazz, frequented by everyone from Charlie Chaplin to Al Capone.