The house where the writer spent his formative years.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

A lush oasis full of vibrant plants and striking geometric displays.

A windswept necropolis carved into the rocks overlooks the "most Portuguese town in Portugal."

A cluster of granite granaries perched on stilts.

Houses are tucked between, on, and underneath giant boulders.

A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.

This abandoned five-star hotel is now a five-star urban exploration destination.

These 400-year-old ruins are all that's left of the monastery where Ines de Castro was assassinated by the King of Portugal.

The magnificent sanctuary is Spain's first purpose-built structure of its kind.

The 20th-century church looks like a rustic version of the Sagrada Familia.

Originally planted by the ancient Carthaginians, this sprawling palm grove is one of the largest in the world.

Fascinating exhibits of prehistoric and ancient artifacts displayed with a uniquely modern touch.

In Spain, the ruins of a Roman military camp sit along a flooded section of a river.

This 47-story "M" needed 20 years to be completed

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

A 16th-century Andalusian palace.

One of Antoni Gaudí’s earliest buildings, built between 1886 and 1890 for the industrialist Eusebi Güell.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

This house's itty bitty size means no humans allowed.

An ancient Egyptian temple in the middle of Madrid, Spain.

This fairy-tale, neo-Gothic church in the Azores is a world of magical realism.

This crumbling Portuguese ruin overlooks the populace it once ruled.

This small chapel is built of human bones and decorated with a golden skeleton.