One of the last functioning antique elevators in Chicago.

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

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

The iconic Chicago sculpture hides a beautiful and easily overlooked plaque on the backside.

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.

One of the largest pieces of scientific equipment ever carried on a NASA space shuttle sits in a Chicago alley.

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

Built to house a chapter of the Knights Templar, this grandiose building is a relic of Freemasonry in Chicago a century ago.

Beloved bar home to musicians of all eras and reputations.

Former meatpacking facility turned vertical farm and sustainable business complex.

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

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

Cemetery featuring rare glass-fronted columbarium.

Chicago's North Park Village was once the largest municipal sanatorium in the country.

Pizza with a side of fine art.

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

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.

The site of the first couple's first kiss is commemorated by the most adorable presidential monument ever.

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

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

An antiquated German apothecary on Chicago's North Side.

A monument to the art of slicing people open.