What was once the second largest steel mill in the US is now a sprawling complex of modern ruins.

The city of Rockford, Illinois is symbolically protected by a quartet of fittingly stony sentinels.

This sprawling mini-golf empire is an impressive testament to a disappearing attraction.

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

What may be America's largest classic video game arcade lurks inconspicuously in a Chicago suburb.

Cemetery featuring rare glass-fronted columbarium.

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

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

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

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

A Bibliophile's Dream.

A speakeasy takes on Chicago's drinking culture.

A remarkably opulent mansion with a tragic history.

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.

Famous church recognized for both its unique design and disciplined monks that live according to the Benedictine discipline.

A small town garden is dedicated to a psychic dog with the most soulful eyes.

One of few surviving standpipe water towers in the U.S.

This art deco masterpiece was once a miracle spring mecca but is now simply a government office building.

What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

If there's another drive-through golf-cart bar in a bat-filled cave on top of a mountain, we don't know about it.

The first rural cemetery west of the Mississippi is home to the elaborate tombs of St. Louis' local beer barons.

This otherworldly church spire reaches up toward the heavens.

This majestic tree has survived 400 years of storms, droughts, and floods, and is a beloved natural landmark in Missouri.

A museum dedicated to man's boldest venture.