Indents in the pavement are all that remain from a grisly death machine in Paris.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

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

France's most famous cemetery, with some of its most curious tombs.

Tucked in the back of a flower shop, its collection details the fascinating history of the Netherlands's iconic symbol.

The attic of a four-century-old canal house hides a clandestine church.

Once the site of a Native American harvest festival, this humble clearing later played an invaluable role in the birth of jazz.

A small park on Bourbon Street features life-size bronze statues of New Orleans musicians.

A museum and shop on Bourbon Street located in the French Quarter.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

One of Ireland's most infamous prisons for rebels including men, women and children.

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

The last Victorian market in Belfast.

An unofficial monument to the late King of Pop sits at the base of a Renaissance composer's statue

The scars of World War II are preserved on its walls.

The footprint of a frustrated devil in Munich's Cathedral.

A fearsome dragon clings to a corner of Munich's city hall.

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.

What looks like a suicide in progress is actually a statue of Sigmund Freud.

A mocking tribute to the past and modern leadership of Prague.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.