A modernist church in an ancient village.

The effect of this ancient form of image projection situated atop an 11th century Moorish palace is thrilling.

This enchanting natural park is a magical example of a temperate rainforest in Europe.

A subterranean relic of the Spanish Civil War hides below this picturesque park.

This mountaintop observatory is home to one of the world's largest reflective telescopes.

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

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

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

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

This chest hospital with a dark, haunted past serves as a fitting set for horror films and a paradise for ghost hunters.

This 47-story "M" needed 20 years to be completed

A contemporary art installation housed within a Gothic cathedral.

This overlooked museum houses an amazing collection of rare, antique typewriters.

This abandoned, turn-of-the-century astronomy hub is now the subject of more photographs than it ever took.

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

Part of the medieval watchtower is displayed in an otherwise ordinary parking garage.

Geological storytelling.

Vibrant street art created with mixed media.

Blue-green pools and smooth stones comprise one of Spain’s most idyllic hidden wonders.

A network of hundreds of interconnected wineries in caves hides under the town center.

The Gaudí-inspired building that was the start of Terrassenc modernism.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

This species of wild goat stars in witchy legends and frolics among the park's eerie rock formations.

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