This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

This amazing piece of modern art honors the hundreds of fishermen killed during Cambrils' "year of misfortunes."

This abandoned gold mine found a second life as a post-apocalyptic film set.

Indigenous cultures believed all life would end if this enormous rock toppled.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

Medieval ruins nestled within a breathtaking swath of Spanish nature.

Head to the mountains to catch a glimpse of Spain's endangered subspecies of brown bear.

Locals use these rock pools and waterfalls for swimming and cliff diving.

A New York–based physician returned home to Spain to build his own elaborate monument to Christopher Columbus.

Peek into a cave of giant, glimmering crystals.

Despite its grandiose name, this enigmatic first-century void under the town is no cave, and it's possibly not a palace either.

Remains of the lost church hide beneath this Spanish Parliament building.

An ornate tower shows off a local artist's architectural flair.

The ruins of a 2,000-year-old Roman fishing village perched on one of the best beaches in Spain.

A spectacular walk on the flank of a gorge.

A neighborhood park in the city of Cáceres hides what some believe are revolutionary examples of Neanderthal cave art.

Stormy conditions send jets of seawater bursting through holes in the cliffs.

This surreal-looking tree pruned more than 1,000 years ago is still producing olives for oil.

This influential Renaissance-era library was once the haunt of kings and monks.

This local emblem is the oldest and largest dragon tree in the Canary Islands.

A five-square-mile slice of Spain on the Mediterranean coast of North Africa.

A modernist church in an ancient village.

A whimsical garden of outsider art in the Spanish countryside.

The ruins of an ancient stadium that hosted gripping chariot and horse races.