Meet the "Green Monster" of Monico, Wisconsin.

This surprising gem is a world-class archeological museum hidden at the University of Chicago.

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

An actual 1957 Cadillac De Ville, encased in 15 cubic yards of concrete.

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

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

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

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

This historic-shipwreck-cum-diving-spot can still be seen poking its boiler out of the Lake Michigan waters that claimed it.

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

Pizza with a side of fine art.

The subtle science of a master molecular gastronomist.

A science teacher's dream.

A lush green oasis in the middle of Chicago.

A Bibliophile's Dream.

The site of a 19th century "dream city" that almost rivaled Chicago before being swallowed by the Indiana sand dunes.

This mysterious hill seems to pull objects uphill.

Ruined pieces of stone and a swimming pool are all that remain of an amusement park swept away by a flood.