Abandoned 18th century weapons factory in the Aezkoa Valley.

Originally slated to become a luxurious resort, this structure is now a graffiti haunt reclaimed by nature.

An abandoned socialist utopia built in the late 19th century.

A spectacular walk on the flank of a gorge.

The ruins of a bombed medieval village memorialize the destruction of the Spanish Civil War.

This underwater graveyard commemorates a group of murdered 16th-century missionaries.

A modernist church in an ancient village.

A magnificent, long-abandoned castle built in the wake of the reconquest of Spain.

Two towns are linked by an engineering marvel masquerading as a boring suspension bridge.

An iconic and controversial ancient Iberian funerary urn with a hauntingly penetrating gaze.

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.

This religious complex carved into a cliff is steeped in legends of miraculous stags and the Holy Grail.

The hidden ruins of an old hydroelectric plant reclaimed by nature.

This line of 12 tower mills described in the story of Don Quixote is among the most iconic landscapes in Spain.

The oldest Roman lighthouse still in use.

A cemetery in Barcelona's Poblenou district is home to this touching funerary statue, which depicts death in the form of a winged skeleton.

This small and often-overlooked museum holds some of Spain's finest artistic treasures.

Numerous sculptures set along hiking trails symbolize and idealize the relationship between man and nature.

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

A charming Spanish village sits atop this natural limestone overpass.

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

A Spanish town built into the cliffs.

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.