The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

Steadily reminding Czechia of its past.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

An abandoned Victorian-era amusement park is rusting away amidst luxury houses.

Everyone's invited to put on a miniature concert with this world-class musical wonder.

The site of a 19th century "dream city" that almost rivaled Chicago before being swallowed by the Indiana sand dunes.

France's most famous cemetery, with some of its most curious tombs.

An unassuming store hides relics of its former life as the jazz club that hosted some of the best black performers of the 1920s and '30s.

Hot Doug's "Hot Dog" Stand.

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

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

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

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

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

These chunky stone towers out in Lake Michigan are the key to Chicago’s drinking water.

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

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

Where old school Polish Chicago and young hipster Chicago live side by side.

This historic hotel invented the chocolate brownie.

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

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

This feline raises a friendly paw at drivers barreling toward the freeway.