Medieval village and microminiature museum.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

Rare karst landscape eroded from a flat seabed.

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

Three bridges and one giant canyon make up this fantastic Spanish settlement.

A once-magnificent collegiate church is falling into ruin.

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

A marble Lucifer hides behind the pulpit of this Gothic cathedral.

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

This ancient theater was once the home of fierce gladiatorial battles.

What if all public housing projects had been designed by "the Pygmalion of modern architecture," not only their prototype?

This tiny cafe is one of the last meeting places of its kind, allowing revolutionaries a place to plot.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

Lyon, France is home to two remarkably preserved Roman theaters, one dating back to 15 BCE.

Memorializing the bravery of one young woman facing the monster of her age.

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

A quaint medieval millhouse hovers surprisingly above the waters of the Seine.

These medieval ruins have survived since the 12th century, even providing shelter from the Nazis.

A well-preserved medieval village nested on a rocky outcrop and surrounded by a network of cliffs, natural bridges and canyons.

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

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

The world's largest reflecting pool is just two centimeters deep.

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.

The world's tallest bridge is also possibly the most elegant.