A 16th-century Andalusian palace.

Hidden behind a wall, Spanish nuns distribute their signature sweets on a revolving tray.

The world's largest wooden structure.

This Michelin-starred restaurant sheds light on a rare period of cultural and culinary tolerance in Cordoba’s past.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

Touching this little fossil embedded in the wall of a grand mosque-cathedral may make your wishes come true.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

This 86,000-square-foot artwork is the largest mural in the world to cover a dam.

A rare set of strings by famed instrument maker Antonio Stradivarius is on display in the Royal Palace.

The first mechanized factory in Spain is also one of the most significant mints in the history of money.

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

Poet Antonio Machado's former residence offers the quintessential Castilian lifestyle of the provincial towns in the early 20th century.

A curious memento mori hangs in the magnificent Cathedral of Segovia.

These "mermaids" that surround a plaza in Segovia are rather sphinx-like.

A controversial art piece that harkens back to local folklore.

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

Meant to resemble a massive tree, the building is the best example of Spanish organicist architecture in Madrid.

This girder was hit by a bomb during the Spanish Civil War, but nobody knew about it until 2016.

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

A reproduction of the famous prehistoric cave paintings is hidden underground at the National Archaeological Museum.

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

This underground church is topped with a 500-foot cross that is seen by many as a beacon of fascist hubris.

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

This embalmed man is one of the best preserved mummies from the Canary Islands.