A charming Spanish village sits atop this natural limestone overpass.

This funky former tobacco factory is one of the most striking examples of Madrid's cultural diversity.

This awesome Spanish castle is so fantastical it was actually used on Game of Thrones.

A Franco-era dam flooded (almost) everyone out of this centuries-old Aragonese town.

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

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

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

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

A Spanish town built into the cliffs.

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

The earliest known map to show America, discovered by accident at a Paris bookshop.

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

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

Village situated on a narrow volcanic escarpment.

A landscape decorated with enormous skull sculptures.

A Spanish forest is filled with mysterious stone carvings.

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

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

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.

Wonderland replication in progress by one persistent man.

A museum dedicated to the Spanish occult in a town that was terrorized by the Inquisition.