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

This enchanting hamlet carved into the rock looks like something straight out of Tolkien's Rivendell.

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

Remarkably intact Roman stone fortifications have encircled this Spanish city for centuries.

This small museum tucked within a subway station holds pieces from Madrid's past.

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

This "flat geyser" bubbles up out of the ground periodically like a disappearing river.

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

This ancient Spanish castle sits high upon a hilltop.

The oldest Roman lighthouse still in use.

"Alleys of Stone" form natural mazes in Spanish natural park.

A site where “the ravages of the war are more striking…than any other place in contemporary Spain.”

Mine shafts and hard pastries await visitors at this massive mountain of salt.

A Romanesque tower appears when water levels drop.

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

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

Moorish signal station on a stratgic rocky outcrop.

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

Mysterious Spanish catacombs of unknown origins.

A science fiction-inspired apartment building designed by a famous Spanish architect.

One of the largest ossuaries in Spain is packed from floor to ceiling with bones.

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

In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

A charming Spanish village sits atop this natural limestone overpass.