A historic observatory precariously perched at the "Top of Europe."

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

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

This replica of Columbus's famous ship houses the history of La Palma's maritime importance during the Age of Exploration.

Once the grandest synagogue in medieval Spain, it now stands as a memorial of the 15th-century Jewish exile.

The discovery of these rare, ancient artifacts led to the creation of a new museum.

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

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

Guitarist Paco de Lucía overlooks travelers as they pass through this train station dedicated to his legacy.

These wooden balconies that are both decorative and functional.

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

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

An early 20th-century bullring converted into a modern shopping center.

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

A complimentary beverage is offered to the bodega's resident rodents every day.

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

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

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

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

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

An ancient Roman theatre restored to its former glory in the Spanish city of Cartegena.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

An eccentric collection of antique items shares space with a prop-quality witchcraft museum.