Tour the luxe "glass cage" that inspired and unnerved the architecture world upon its debut.

A onetime gangsters' hideaway where you can dine on steaks, fine wines, and cigars just like they once did.

Arguably the best example of an authentic Dutch windmill in the United States, rivaling its counterparts in the Netherlands.

World's second largest particle accelerator, where nature reveals its secrets.

A tribute to one granddaughter's old apartment which now represents the whims of each visitor.

First planned industrial community in the United States.

Recognized the world over as the home of the McCallisters in the 1990 movie "Home Alone."

This botanical garden outside Chicago boasts an array of more than 300 varieties of lilacs.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.

Pizza with a side of fine art.

It was originally part of a "terrible lizards" collection at the 1964 New York World’s Fair.

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

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

The famous author's birthplace is preserved in a town that he once described as narrow-minded.

This bronze sculpture on a former squash court marks the secret origins of the Atomic Age.

Cemetery featuring rare glass-fronted columbarium.

Chicago's largest cemetery is full of beautiful Victorian monuments and more than a few ghost stories.

This landmark of the Chicago silent film industry may not be in the picture business anymore but it still stands proudly.

An antiquated German apothecary on Chicago's North Side.

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

A haunting statue called "Eternal Silence" has quite the reputation among visitors with active imaginations.

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

Hot Doug's "Hot Dog" Stand.