Huge abstract sculptures of the Puerto Rican Flag.

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

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

The 606 is a decade in the making.

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

A monument to the art of slicing people open.

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

This awkward aquarium sculpture is one of the strangest statues in Chicago.

To find the "unicorns of the deep" you've got to go downstairs.

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

The palatial McDonald's that inspired Wesley Willis.

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

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

Illegal drag racing two stories beneath Chicago’s streets.

Small and slightly hidden, the American Writers Museum is preserving the legacy of America's finest authors.

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

A spectacular remnant of an Adler and Sullivan masterpiece that was destroyed in 1972.

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

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

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

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

A gothic church spire sits atop this skyscraper, the tallest church in the world.

This historic hotel invented the chocolate brownie.

Nature's biggest mammal swims in landlocked Oklahoma.