The site of murders and Satanic cult gatherings.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

A World War II evacuation tunnel turned into a history display of Croatian state and people.

This 135-year-old weather station studied the effects of the climate on human health.

An ancient knight and a symbol of the city's freedom.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

A musical instrument played by the sea.

Spain's largest bullring offers a unique glimpse at architecture and history.

Legends surround this natural rock formation that looks like a Moorish king wearing a crown.

This Roman arena once played host to bloody gladiatorial battles.

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

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.

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

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

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

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

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

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

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

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

Stunning Roman aqueduct used for 1900 years and still standing.

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