This neon landmark has been posing this deadpan question to follicly-challenged Dubliners for over 50 years.

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

Take a walk in a recreation of ancient Rome.

A century-long search for a church that was never there.

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

As lake waters recede, a German village reemerges after more than a hundred years.

Retirement home for giant obsolete machines.

For over 300 years this little carving has been the city’s good luck charm.

In an area where the remnants of WWI are discovered on a regular basis this preserved frontline trench may be the most amazing.

An underground city of ancient quarry tunnels hid thousands of Allied soldiers in WWI.

Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

Remains of the artificial harbours invented for the Allied invasion of Normandy can still be seen at sea.

Underneath a chalk hill in France lies what Hitler hoped would be the underground launching base for a devastating new weapon.

A daring D-Day assault by U.S. Army Rangers is commemorated atop the high cliffs of this strategic point.

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

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

One of the largest burial mounds in the Netherlands and Belgium.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

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

Mountain where Jesus was first tempted by the Devil.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Berlin's old airport.

Famously misunderstood wonder of the ancient world