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

An outdoor urban gallery of large-scale artworks by the world's most influential street artists.

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

At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.

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

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

Shop of curiosities with a dinosaur museum tucked in its basement.

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

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

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

A hollow cement depiction of time's inexorable effect on the human body.

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

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

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

An antiquated German apothecary on Chicago's North Side.

A Bibliophile's Dream.

A giant bronze coil of feces is both a tribute to doggie defecation and a reminder to pick it up.

A lush green oasis in the middle of Chicago.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

This morbid, delightful curiosity shop offers everything from animal bones to human teeth.

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.