This abandoned mansion has a window for every day of the year, and is a temple for ghost hunters.

Bold black and white motifs of life and death add a dramatic flair to this 17th-century crypt.

The world's first electric battery-powered submarine.

Legends surround this natural rock formation that looks like a Moorish king wearing a crown.

Peek into a cave of giant, glimmering crystals.

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

The 20th-century church looks like a rustic version of the Sagrada Familia.

The two massive guns that defended Cartagena Bay.

This small Spanish village still pays homage to the Spaghetti Western films that were shot there in the 1960s.

Originally planted by the ancient Carthaginians, this sprawling palm grove is one of the largest in the world.

This ancient rock painting is the oldest evidence of humans’ love affair with honey.

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

If you like Art Deco you will love this bridge.

Holding the current title of "biggest chair in the world," it stands with little fanfare in Lucena, Spain.

Down this yellow brick road, visitors are treated to toadstool houses and massive mushroom sculptures.

The extensive relics of an ancient Roman and Phoenician fish processing plant hide in a town park.

This site is both a remarkable reminder of the town's mining history and a fantastic government blooper.

Fascinating exhibits of prehistoric and ancient artifacts displayed with a uniquely modern touch.

Abandoned tunnels dug for the once-thriving sea salt industry on the coast of southern Spain.

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

An enchanting landscape of ancient sandstone structures eroded into otherworldly shapes.

The Roman city was the birthplace of various emperors and is home to one of the empire's most impressive architectural feats.

A modernist church in an ancient village.

A well-restored ancient archaeology site gives a real feel for life during the Roman age.