A square-domed symbol of resilience in the heart of the old Jewish Ghetto.

This ancient Roman arch misled treasure hunters for centuries.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Since 1999, this gelateria founded by a string instrument maker has been turning out some of Rome’s best scoops.

The remains of 40,000 humans, meticulously stacked in a tiny churchyard shed.

This stunning French estate was so lavish that it landed its original owner in jail for the rest of his life.

A museum dedicated to one of Paris’s most famous residents, tucked into a corner of one of the city’s most famous squares.

At Monet's beloved home you can still see the Japanese bridge, waterlilies, and weeping willows that were the subjects of some of his most iconic paintings.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

The National Park Service’s best-kept secret with views that rival any in D.C.

This classic photo booth was saved from destruction by the local community.

Dedicated to the European Sinti and Roma peoples murdered during the Holocaust.

This platform is now a memorial dedicated to those who were deported during the Holocaust.

A memorial in the Tiergarten is a reminder of the suffering inflicted on homosexuals by the Nazi regime.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

A brush maker used his factory to protect blind Jews from the Gestapo.

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

The last remnants of a massive medieval wall that once encompassed the city of Berlin.

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

A fascinating insight into daily life in the Eastern Bloc.

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

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