A magnificent place to see authentic paleolithic cave paintings that are an astounding 33,000 years old.

Now a pile of ruins and rubble, this was a lovely mountain town as recently as 1960.

The unexpectedly beloved remnants of a controversial thermal power plant.

This imposing modern citadel started out as a home renovation project.

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

A contemporary art installation housed within a Gothic cathedral.

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

12th-century holy complex shares land with a natural park full of heavenly waterfalls and raptors.

Seaside ruins of a settlement that date back to the first century B.C.

A historic Christian shrine nestled within a spectacular natural cave.

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

This stunning iron gate designed by Modernist architect Antoni Gaudí is filled with mythic symbolism.

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

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

An ancient Roman theatre restored to its former glory in the Spanish city of Cartegena.

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

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

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

Occupied for six centuries by Franciscan Order nuns, this monastery is an amazing ode to Catalán Gothic architecture.

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

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

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

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.