A dozen cast iron leopards stand guard along the length of Aberdeen's Union Bridge.

Scotland's oldest medieval bridge is also among the last reminders of early medieval Aberdeen.

Commonly acknowledged as the only public monument to the Devil himself.

Once home to some 250,000 volumes and priceless art artifacts, this Polish estate was a target of bombing during World War II.

The world of the ancient Celtic civilization explained through a bewitching 11 acre garden.

Warsaw's fantastically preserved gasworks...almost.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

A hidden art gallery in an abandoned Warsaw fort.

A program of Communist glamour in post-Stalin Poland is preserved in this colorful museum.

Eclectic architecture in the woods of New York.

The music is over at the Ballhaus Riviera Ballroom, but the ballroom remains in haunting disrepair.

The site where a plot to assassinate Hitler was planned—and its conspirators were executed—is now a powerful memorial to the German resistance during World War II.

This watchtower once presided over the Berlin Wall.

This curious sculpture represents the perseverance needed to take to the skies.

A museum in the building where Nazi Germany signed its surrender tells the story of World War II from the Soviet perspective.

Named after a militant urban guerilla, this famous former squat is a graffiti-covered stronghold of leftist culture.

These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

The walls of Germany's Parliament still show the scars of the Red Army takeover in World War II.

A restaurant and observation deck built in a unique broadcasting antenna.

This conical hill was built as a testing ground for an engineer known as the Glider King.

A 12th-century fortress containing some of Berlin's oldest buildings.

Where once there was a train station bathroom, there is now this German burger joint.

A collection of abandoned typographic signs from Berlin and beyond.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.