Where America's first doomsday cult awaited the end of the world.

This storied music venue was once a tavern that housed an Italian Anarchist book club and prohibition parties; today it's a community space for artists and musicians.

What appears to be a wizard's lair in Milwaukee actually houses a massive water pipe.

A wonderfully curated used bookstore in an airport.

Literally a million fascinating cartographic artifacts are held in this sprawling university collection.

Once a speakeasy operated by Al Capone, this Milwaukee cigar bar is now a haven for ghost hunters.

A giant, Gilded Age mansion that once belonged to the beer baron of Milwaukee.

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

In a quiet north Chicago neighborhood rests a stunning relic of the golden age of earthenware design.

First planned industrial community in the United States.

Cemetery featuring rare glass-fronted columbarium.

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

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

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

The beloved home to all publications indie, erotic, and punky.

All of Chicago's wood-paved streets are long gone but two alleys remain.

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

An enormous park-like oasis, full of famous Chicagoans' graves.

An antiquated German apothecary on Chicago's North Side.

A Bibliophile's Dream.

A lush green oasis in the middle of Chicago.

The singer, actor, and activist lived here during his final years, and now it’s a museum dedicated to his legacy.

An Irish Memorial commemorating those who perished due to potato blight.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.