Possibly the oldest masonry dam in all of Europe.

The grotto where Saint Ignatius of Loyola lived as a hermit for nearly a year.

The defensive tower was built centuries ago to warn locals of Berber pirate attacks.

Open air sculptures by an eccentric and loin-clothed hermit.

Sanctuary on a ridge near an ancient shrine to a "Black Madonna" built by the founder of Opus Dei.

Walls of stone rise up from sinkholes caused by underwater erosion.

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

This spectacular bridge is part of an abandoned train line that once connected Mallorcan capital to the southeastern coast.

The building hides in plain sight in Ribadavia's historic Jewish quarter.

This stop on the Camino de Santiago stands high above the underwater ruins of a medieval town.

This magnificent market stands as a poignant symbol of the suffering caused by the Spanish Civil War.

This unique rock formation is quite the local celebrity, although one day it may come crashing down.

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

If you like Art Deco you will love this bridge.

This multi-level, aqueduct-footbridge hybrid is one of the greatest works of the Spanish Renaissance.

Medieval ruins nestled within a breathtaking swath of Spanish nature.

The highest peak in mainland Spain is said to be the final resting place of a Muslim king.

An impressive home made of stone, carved more than a century ago.

The most elaborate of 12 medieval arched doorways to the old city of Burgos.

A dictator's failed public works project has been reborn as two linked trails through spectacular scenery.

This architectural oddity is an oasis of green on the outskirts of Valencia.

The abandoned club hides in the hills of Ibiza.

A 12th century church completely covered in shells.

Two large eyes painted anonymously on a mountain overlooking the city pay homage to an old legend.