In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Macabre astrological automaton clock dating to the late 1400s.

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

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Steadily reminding Czechia of its past.

What looks like a crashed Zeppelin is actually a bright, airy reading room perched atop a modern museum.

Wisconsin's most celebrated export gets the royal treatment on I-94.

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.

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

The palatial McDonald's that inspired Wesley Willis.

This memorial plaque remembers a strangely shallow maritime disaster known as "Chicago's Titanic."

Illegal drag racing two stories beneath Chicago’s streets.

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

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

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

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

This museum celebrating the almighty dollar lets visitors literally stand in the shadow of a million bucks.

This historic hotel invented the chocolate brownie.

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

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

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