Tiny treasures, giant murals, and strange sculptures decorate the windows and doors of this abandoned building.

These Depression-era WPA sculptures have made a couple of stops over the years.

Though it's thrived abroad, this forgotten Dunkin' rival has just one store left in the States.

This historic house museum that celebrates one of the world's most influential social reformers is also one of the most haunted locations in Chicago.

Pumpkin-like gargoyles and grotesques peer down from the rooftop of this unassuming apartment building in Illinois.

The park that the Chicago Stockyards built.

Now nearly abandoned, Kaskaskia was once the capital of Illinois and one of the most important towns on the upper Mississippi.

Julia Buccola Petta's body was peculiarly well-preserved when it was exhumed six years after her death.

One of the first historical sites of an alternative universe was installed in the town of Paris, Illinois—which is now home to an annual spelling bee of Kcymaerxthaereal words.

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

Cold War missile launch site which has been converted to a public park.

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

You can take a class, browse the library, or visit the lavish lair of an international men's humor society.

One of Chicago's last seafood smokehouses perfects a dying breed of fishcraft.

The face of a woman pushes its way through the earth.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

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

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

A hot dog stand where the heads are just as hot as the dogs.

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

Cemetery featuring rare glass-fronted columbarium.

River pirates, murderous bandits, and serial killers used this Illinois cave as their debauched hideout.

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

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