Volcanic rocks ground down into sand make this Spanish beach as black as night.

Its appearance in "Game of Thrones" may spur on the long-awaited restoration of this medieval shipyard.

Mysterious Spanish catacombs of unknown origins.

This magical space partly designed by Antoni Gaudi is one of the best examples of romantic gardening in the Mediterranean.

Cliffside houses provide a spectacular view from their perch above the valley.

Partially collapsed lava tube and cave system complete with concert hall, underground pond, and unique albino crabs.

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

A charming Spanish village sits atop this natural limestone overpass.

A once grand hotel now sits eerily abandoned in the Catalan countryside outside Barcelona.

A completely underwater art museum sends a stark message about humans' impact on the environment.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

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

A Spanish town built into the cliffs.

Village situated on a narrow volcanic escarpment.

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

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

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

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

The morbid items in this small and hidden museum are not for the weak stomached.

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

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

At the foot of a waterfall lies a peaceful swimming lagoon and evidence of over 60,000 years of human habitation.

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.