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

Northern Ireland's Brobdingnagian stepping stones.

A museum marks and documents the site of the Titanic's launch.

This Victorian-era public house has set the standard for pub-style elegance for over a hundred years.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

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

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

The ancient tomb acts as a calendar that keeps perfect time.

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

This ancient Irish tower could easily have stood in for Rapunzel's prison.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

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

The world's oldest map of the holy land gives us a fragmented glimpse of the layout of biblical nations.

Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.

Fifteen Jodhpur queens left their handprints before going to their fiery death.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

The mortal remains of an estimated 70,000 people lie in the basement of a monastery in Lima, Peru.

Hundreds of prehistoric stones, arranged in perfect lines in a French field.

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

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

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

This castle-fortress is a living example of the transition from medieval defenses to modern fortifications.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

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