For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

Artist Natividad Sánchez wrote a new ending for one of Roman mythology's tragic love stories.

Commonly acknowledged as the only public monument to the Devil himself.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

This enigmatic artifact is a rare depiction of an ancient Iberian noblewoman.

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

A towering monument in Spain has proven to be more labor-intensive than initially planned.

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

A huge cathedral single-handedly constructed by one eccentric monk.

This postmodern apartment block was designed to be a vertical neighborhood.

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

A controversial art piece that harkens back to local folklore.

A magnificent, long-abandoned castle built in the wake of the reconquest of Spain.

These magnificently sculpted tombs represent Spain's own legendary version of "Romeo and Juliet."

Geological storytelling.

This ancient tunnel is one of the most important examples of Roman hydraulic engineering in Spain.

A museum dedicated to the Spanish occult in a town that was terrorized by the Inquisition.

This Navarrese cave's history of witchcraft and pagan ritual is not just embraced, but recreated each year.

The oldest operating roller coaster of its kind, the Montaña Suiza has been thrilling riders since 1928.

Originally used to sell brandy, the bull-shaped billboard became an iconic symbol of Spain.

Eccentric sculpture garden brings Basque mythology to life.

This religious complex carved into a cliff is steeped in legends of miraculous stags and the Holy Grail.