This titanic Catholic church in Chicago is also a refuge of the fictional cult-favorite wizard detective Harry Dresden.

The original Garfield station is the oldest station facility on the "L", with the station house dating from 1892.

One of the few remaining relics of the meatpacking hub that made Chicago the "hog butcher to the world."

This awkward aquarium sculpture is one of the strangest statues in Chicago.

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

Rifle through images of skyscrapers, Worlds Fairs, and more in the largest public postcard repository in America.

To find the "unicorns of the deep" you've got to go downstairs.

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

This surprising gem is a world-class archeological museum hidden at the University of Chicago.

An avant garde art museum at the University of Chicago.

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.

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

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

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

The world's only known button museum.

These abandoned grain silos and tunnels are an urban exploration dream.

This historic hotel invented the chocolate brownie.

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

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

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

The video game-themed street art first popped up in the French city.

A 400-year-old church covered floor to ceiling in ex-voto offerings from the faithful.

A popular shrine where the Blessed Virgin allegedly appeared in 1830, displaying a holy armchair and two incorruptible remains of Lady Saints.