The palatial McDonald's that inspired Wesley Willis.

Hot Doug's "Hot Dog" Stand.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

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.

The 606 is a decade in the making.

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

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.

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

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

At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.

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

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

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

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

Location of the Real World's disastrous, and protested, eleventh season.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

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

This shop for all your super spy needs hides an educational secret.

A long lost multi-cultural music venue used to reside in the bottom floor of Chicago's Flat Iron Building.

A Bibliophile's Dream.

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

One of the last functioning antique elevators in Chicago.