A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

This classic restaurant features a gorgeous mirror-clad room.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

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

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

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

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

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

This futuristic German television spire is actually the world's largest digital clock.

This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

These bronze pamphlets remember a remarkable group of Germans who fearlessly opposed the Nazis in the very center of their power.

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

The entrance to this Frankfurt subway station looks like an old tram car crashed into the concrete sidewalk.

A preposterously luxurious hotel with gold-plated iPads, Rolls Royce chauffeurs, and a staff that trains by watching "Downton Abbey."

On any given day this sprawling market houses literally tons of government-regulated gold, gems, and precious metals.

This indoor ski resort has a mountain contained inside a mall.

Billed as the "largest natural flower garden in the world" this Middle Eastern show field has little competition at 45 million flowers.

A faithful reproduction of Al-Jazari's enormous water clock.

A simple plaque on the facade is the only reminder that the treaty ending the American Revolution was signed inside.

This Parisian gem is one of the most incredible ethnographic museums in the world.

Walk through spectacular aisles of hanging meat and wagon wheel–sized cheese at the world's largest wholesale food market.

The narrowest street in Paris.