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

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

First planned industrial community in the United States.

A little-known subterranean street runs under some of the best-known buildings in Chicago's River North.

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

The beloved home to all publications indie, erotic, and punky.

A shining sculpture made of 3,115 lights, the number of visible stars in the Northern Hemisphere.

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

Chicago's North Park Village was once the largest municipal sanatorium in the country.

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

Chicago's museum dedicated to the history of bondage and fetishism is more textbook than titillation.

This historic hotel invented the chocolate brownie.

Internationally known record store and purveyor of "dusties."

An antiquated German apothecary on Chicago's North Side.

A monument to the art of slicing people open.

A lush green oasis in the middle of Chicago.

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

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

A collection of objects supposedly singed by the hands of souls in purgatory.

A massive bur oak tree believed to be some 500 years old is the centerpiece of this quiet urban greenspace.

A collection of 11 million buttons illustrates the human toll of the Holocaust.

An abandoned observatory in the middle of the Illinois prairie.

Once known as the Illinois Asylum for the Incurable Insane.

The legacy of an unsolved, gruesome murder rests beneath the spans of this historic bridge.