A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

Berlin's old airport.

Blitzkrieg bop your way through Berlin's Ramones Museum.

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

This World War II bunker now survives as a documentation of the Nazi regime and war crimes.

Tiny memorials honor individual victims of the Holocaust.

An old department store turned Nazi prison turned artist commune.

The most visited, and possibly most controversial, museum in Germany.

A fascinating insight into daily life in the Eastern Bloc.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

Prehistoric history as seen through the lens of an outsider artist.

A Cuban artist reclaimed his impoverished neighborhood as a dreamy folk art kingdom.

A bronze sculpture of Lenin’s likeness outside Havana surrounded by 12 human figures in solidarity with the Bolshevik Revolution.

His music once banned in Communist Cuba, John Lennon is now immortalized in bronze by Castro, who considers Lennon a "fellow dreamer."

Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

In terms of history and architecture, this is one of the most remarkable cemeteries in the world.

This communist country can still appreciate its fragrant past.

No one knows the meaning behind this giant sculpture of a nude woman with a fork riding a rooster in Havana.

After the Cuban Revolution, the famous rum company had to leave their swanky headquarters behind.

A colorful narrow alley in Cuba is full of street art and sculptures made of found objects.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

This historic toy museum brings a little whimsy to a city not usually remembered for such things.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.