A fantastic castle rumored to be the birthplace of King Arthur.

Cornish legend says these ancient circles were people turned to stone for playing hurling on a Sunday.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

A circle stone within a stone circle.

A neolithic dolmen that was rebuilt after collapsing during the 19th century.

Perhaps the only prehistoric monument with its very own public bus stop.

At high tide, the base of the lighthouse covers practically every inch of the island.

The world's largest second-hand graces a clock surrounded by constantly changing flower beds. 

This bridge was constructed from the rubble of the infamous Bastille.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

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

This center tells the story of one of the most famous battles in Irish history.

This Neolithic passage tomb forms part of a World Heritage Site.

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

The modern birthplace of Irish freedom.

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

You can see three Irish counties from this Neolithic hillside fort, once the seat of the Kingdom of Ailech.

Ruins battered by centuries of war and disaster offer a wondrous glimpse of medieval Ireland.

These imposing walls and towers look more like the ruins of a fortress than a monastery.

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

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

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

A stunning Victorian abbey and walled garden on a lakefront.

The ruins of an 800-year-old monastery boasts the tallest round tower in Ireland.