This smaller cousin of the Forbidden City has gone from ancestral sacrifice to tourist's whispers.

Why walk on this historical site when you can zoom down instead?

The most famous location in China was home to whole dynasties worth of imperial rulers.

Behind medieval walls in a corner of bustling Palermo is a breathtaking former mosque once inhabited by a wolf-taming hermit.

This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

The most loyal of little dogs, or a Victorian era publicity stunt?

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Site of the first radio and telephone broadcasting companies in Copenhagen.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

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

The sweet story of how American cargo planes became known as "Candy Bombers" during the Berlin Blockade.

Fantastic views and thousands of love locks.

According to a satirical conspiracy theory that persists today, this German city of 300,000 is a hoax invented by the CIA.

Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

The Bauhaus-style former industrial complex is considered the world's most beautiful coal mine.

Every hour the doors open to reenact the legend of the heroic mayor who saved his town by drinking a gallon of wine.

Germany's Glienicke Bridge has a shady history of clandestine meetings, espionage, and spycraft.

Cold war icon and onetime "hole" in the iron curtain.

A German apartment building hosting as many trees as human occupants.

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

Berlin's old airport.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.