Illegal drag racing two stories beneath Chicago’s streets.

This memorial plaque remembers a strangely shallow maritime disaster known as "Chicago's Titanic."

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

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

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

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

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

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

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

This modest post office sits on the site of H.H. Holmes' famous murder castle.

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

This alley in downtown Chicago held the bodies of over 600 people after the fateful Iroquois Theatre fire.

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

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

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

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

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

A science teacher's dream.

A lush green oasis in the middle of Chicago.

A monument to the art of slicing people open.

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

Order scoops of pandan, lychee, and black sesame at this family-run institution.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

One of the oldest continually operating drinking establishments west of the Mississippi.