The modern birthplace of Irish freedom.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

This former charity hospital for elderly clergy houses some of Seville’s most treasured paintings.

Considered the birthplace of the Copper Age and Bronze Age, the river is tinted red from 5,000 years of mining.

The world's largest wooden structure.

The final resting place of the great navigator, or maybe his brother.

An isolated village literally built into the crevices and rock formations of a mountain.

Village situated on a narrow volcanic escarpment.

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

This Navarrese cave's history of witchcraft and pagan ritual is not just embraced, but recreated each year.

A whimsical brother of the nearby Fallen Angel statue takes the falling part quite literally.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

A landscape decorated with enormous skull sculptures.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

A gravity-defying "devil's bridge" that has a surprising architectural feature for its stability.

This whimsical winery by Antoni Gaudí looks ripped from the pages of a fairytale.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

Turntable anonymously received orphans, alms, and groceries.

A lush indoor jungle fills this bustling Madrid transportation hub.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

Natural stone arches form a walkable "cathedral" at low tide, then disappear entirely when the water returns.

This former Baroque palace on the historic Calle Montcada is a rare architectural gem and was once the meeting place of an aristocratic scholarly society.

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

An enchanting monastery in the Spanish countryside appears lifted from a fantasy tale.