Erotic art covers the walls of the largest ancient pleasure palace.

The mysterious large white cross visible from the runway is a memorial to a massacre during Spanish Civil War.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

The whiskey producer's archives includes a historical list of infractions committed by and associated penalties exacted upon employees.

The ruins of a medieval monastery named after a type of tree.

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

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

This ancient Irish religious site is covered in ancient carvings, many of which have barely aged.

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

A stunning Victorian abbey and walled garden on a lakefront.

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

The oldest inn in Kilkenny was established by the first convicted witch in Ireland.

Breathtaking and huge 430 year old maps of Italy.

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

These temples are among the oldest free-standing stone buildings in the world.

Dynastic Home of the De Piro Family.

The fishing boats that moor in this small lagoon enter and leave through a tunnel to the sea.

This unique building in the main square stands out among the city's typically Baroque architecture.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

The largest masonic lodge in Cuba.

No one knows the meaning behind this giant sculpture of a nude woman with a fork riding a rooster in Havana.

Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

Castro's communist ice cream mothership has been serving five-scoop "salads" for over 50 years.

A New Zealand communications tower stands as the tallest structure in the Southern Hemisphere.