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

The unfinished final resting place of some of Spain's most prominent politicians.

This enormous censer uses a pulley system installed over 400 years ago.

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

An accidental trick of light casts the perfect shadow of a pilgrim of the Camino de Santiago against the cathedral wall.

Among the oldest structures in Madrid, these Moorish walls once guarded the medieval city of Mayrit.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

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

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

The little church's beautifully frescoed ceiling has earned it the nickname “the Sistine Chapel of Madrid.”

Thanks to an acoustic anomaly, this unassuming stone bench has heard one hundred years of secrets.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

Its appearance in "Game of Thrones" may spur on the long-awaited restoration of this medieval shipyard.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

This former charity hospital for elderly clergy houses some of Seville’s most treasured paintings.

In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

The world's largest wooden structure.

The final resting place of the great navigator, or maybe his brother.

A whimsical brother of the nearby Fallen Angel statue takes the falling part quite literally.

A lush indoor jungle fills this bustling Madrid transportation hub.

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

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

An ancient Egyptian temple in the middle of Madrid, Spain.

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