This Italian-style temple replica has been threatening to fall off the Irish coast for hundreds of years.

A peace symbol in Northern Ireland is among the world's largest hedge mazes.

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

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

A former waterfront market is now in the center of town due to some interesting Boston engineering.

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

The oldest inn in England served brew to the crusaders.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

The heads of two giant mythological water horses honor Scotland's horselord past.

Northern Ireland's Brobdingnagian stepping stones.

A hands-off space for graffiti artists to hone and display their skills.

This castle once belonged to one of the most prominent families of medieval Carrickfergus.

This 18th century mansion played Winterfell in Game of Thrones.

A medieval abbey featured on 'Game of Thrones' that dates back to the 12th century.

A boulder in the Churchyard of Down Cathedral marks the legendary burial place of "The Apostle of Ireland."

If you don't look closely, you might mistake this sculpture for just another passenger waiting at the airport.

Few other hotels can rival the grandeur of the Castle in the Rockies.

David Robert Jones was a Berliner — from 1976–1978

A derelict hunting lodge that was once the site of aristocratic debauchery.

Despite the name, this 16th-century structure in Galway wasn't built by the Spanish.

The smallest chapel in Europe is a moving testament to the love between a husband and wife.

The modern birthplace of Irish freedom.

These gigantic skeletons tower over visitors and provide insight into the creatures that once ruled over Ireland.

The block of aged dairy is probably still edible after 2,300 years in a peat bog.