A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

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

This modest plaza in Moneygall, Ireland has cashed in on its distant connection to the U.S. president.

Five candy-colored villages on the Italian Riviera.

An enormous and lavish Gothic church in Czechia.

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

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

See some of the world's greatest racing horses at this idyllic thoroughbred breeding facility and garden complex.

An Iron Age fort on the edge of a seaside cliff offers a glimpse into an ancient, mystical world.

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

Italian poet Dante Alighieri is entombed in this small mausoleum in Ravenna, and his hometown of Florence has never been too happy about it.

A corkscrew-shaped barn in Ireland.

Obelisks and stone pineapples in the Irish countryside.

The mark of the Devil's horns on a marble column in Milan.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

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

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

A proud bronze billy stands as an eternal symbol of Ireland's oldest festival, where a goat is made king.

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

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

The skeleton of a whale that beached itself in this Irish town is now on display in their public park.

The modern birthplace of Irish freedom.

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