A mysterious castle built as a monument to lost love.

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

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

The first and only museum dedicated to stained glass and horology opened outside of Chicago in 2017.

A science teacher's dream.

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

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

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

Hot Doug's "Hot Dog" Stand.

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

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

Once called the "Polish Gold Coast" it is an icon of the neighborhood that bears its same name.

A display of magnificent stained glass windows is the first exhibit of its kind.

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

The palatial McDonald's that inspired Wesley Willis.

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

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

Home to a protest movement, a bombing, and a dramatic change in labor history.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

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

A spectacular remnant of an Adler and Sullivan masterpiece that was destroyed in 1972.

Once at the center of U.S. finance, the historic Trading Room was meticulously recreated piece by piece and rebuilt in the Art Institute.

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.