Gladiators battle and chariots race daily in the ruins of a once-great Roman city.

A series of vibrant murals celebrate the culture and community of Oakland.

Wander down a side street dedicated to one of the members of the Beat Generation.

A shining, cold, black organ lies in San Francisco's financial district.

Faceless white figures loom over the city from the rooftop.

Get a close-up look at a 16th-century Basque whaling ship at this factory and museum.

The world's largest sundial can cast a shadow more than 1,600 feet long.

The engineer of the Imperial Canal of Aragon installed this fountain to show skeptics he had achieved his aim.

This grandiose staircase was part of the revival of a medieval Spanish architectural style combining Christian and Islamic influences.

This multi-level, aqueduct-footbridge hybrid is one of the greatest works of the Spanish Renaissance.

This whimsical winery by Antoni Gaudí looks ripped from the pages of a fairytale.

This Roman arena once played host to bloody gladiatorial battles.

Long tunnels run under the ancient chariot racing circuit to the tower.

Stunning Roman aqueduct used for 1900 years and still standing.

A place steeped in history that may be best known as the set of a 1960 film.

Translating as "The Jump of the Girlfriend," this stunning waterfall has a tragic legend behind it.

Beautiful tiles decorate many of the town's surfaces and stand testimony to its glorious artistic history.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

A statue of a boy looks up at where the famous rival to the Leaning Tower of Pisa once stood.

This 11th-century fortress is now the seat of Aragon’s state legislature.

Historic medieval fortified city in southwest France.

The original shop where the iconic Belgian praline was invented.

This cannonball has been lodged in the church wall since a 1695 bombardment destroyed the city center.