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

An Irish town has built a statue to a silent film actor simply thanks to the holidays he once spent there.

The world's only flying boat museum honors a small Irish village that sent 20th-century aviation to new heights.

Ireland's most remarkable collection of these curious cone-shaped houses is worth the buzz.

A hugely vast Irish landscape of barren rock that stretches for miles.

This single room has survived the centuries with almost no deterioration.

The elliptical citadel resisted the advance of the mighty Ottomans several times, thanks to the military prowess of the "Dragon of Albania."

What happens when you cross a mayor and a painter?

This ominous Albanian fortress houses tanks and downed planes as a reminder of their victories over Western imperialism.

Hundreds of thousands of concrete bunkers crowd Albania long after the fall of Communism.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

A naturally beautiful, seemingly bottomless deep blue spring.

Hidden beneath the streets of London is a secret subway that only carried mail.

The celebrated eyesore created by starry-eyed sweethearts.

An image of the legendary saint stands in the shadow of a cathedral she liberated.

This enormous "cloth of the conquest" depicts the Norman invasion of England in mind-blowing detail.

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

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

The industrial architecture honors the laborers who brought the Exposition Universelle of 1900 to life.

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

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

This medieval tower is all that remains of the castle where Joan of Arc was held before being burned at the stake.

This modern French ossuary contains the jumbled bones of 130,000 WWI soldiers.

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.