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

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

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Located in the thermoelectric factory that once powered the entire city, this Portuguese museum is shockingly fascinating.

Hidden beneath a beautiful overlook you’ll find the history of the city depicted in comic strip format next to a pay toilet.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A lush indoor jungle fills this bustling Madrid transportation hub.

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

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

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

This unassuming bookstore in the heart of Madrid is one of the oldest in Spain.

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

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

Traditional 11th-century outdoor tannery.

The other side is actually green.

The fairy tale castle of the "fairy-tale king."

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The most visited, and possibly most controversial, museum in Germany.

An open-air museum in a mountain valley features works designed to blend in with—and disintegrate back into—their natural surroundings.

One of the tallest bell towers in Italy plays a particular melody at just two times each day.

One of the largest squares in Europe contains an entire artificial island.

This Renaissance palace features a unique architectural design and is now home to the Ferrara National Art Gallery.

All that is left of this medieval castle is two towers, both of which now display a visible tilt.

Southern Italy's spinning top village.