What was once one of the country's largest confectionary plants is now an abandoned ruin, but is still pretty sweet.

Chicago was once a major hub of film production, but being silent film you don’t hear much about it.

A strange and haunting monument of unknown origin in the historic Graceland Cemetery.

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

An unassuming store hides relics of its former life as the jazz club that hosted some of the best black performers of the 1920s and '30s.

These chunky stone towers out in Lake Michigan are the key to Chicago’s drinking water.

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

The world's only known button museum.

These mansions date back to Chicago's days as a brewer's paradise.

A speakeasy takes on Chicago's drinking culture.

Orthodox church partially financed by Tsar Nicolas II.

Parking lot where a Chicago mayor was inaugurated under very sketchy circumstances.

Once an ornate movie theater remade by Catholic Charities.

No one knows how many bodies are in this vault in a Chicago public park.

A Chicago Movie Palace Lost to Time.

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

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

Nonprofit art center that promotes outsider, intuitive, and self-taught art.

A Museum of Holography frozen in 1974.

Where dioramas can follow you home.

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

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

A century-old network of freight tunnels underneath the city's historic business district.

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