Tiny memorials honor individual victims of the Holocaust.

Berlin's old airport.

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

This classic restaurant features a gorgeous mirror-clad room.

The palatial McDonald's that inspired Wesley Willis.

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

Huge abstract sculptures of the Puerto Rican Flag.

G.V. Black, the Father of Modern Dentistry, keeps an eternal eye on Chicagoan’s teeth from his perch in Lincoln Park.

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

Illegal drag racing two stories beneath Chicago’s streets.

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

This urban drawbridge gained eternal pop culture fame when the Blues Brothers jumped it while it was raised.

This bronze sculpture on a former squash court marks the secret origins of the Atomic Age.

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

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

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

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

Cemetery featuring rare glass-fronted columbarium.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

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

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