Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

Touching this little fossil embedded in the wall of a grand mosque-cathedral may make your wishes come true.

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.

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

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

A 16th-century Andalusian palace.

The world's largest wooden structure.

A contemporary art installation housed within a Gothic cathedral.

This network of narrow, medieval passages has the most delightful name.

A Reformation-era fiery figurehead once denoted this location as a print shop.

London's smallest police station is barely the size of a phone booth.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

Where's a guy to go after a long, hard day at work?

This lush area was the site of extensive enemy bombing during WWII.

Residential building on the Regents Canal is a breeding ground for creativity and innovation.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

A flourishing garden with pigs, donkeys, goats, rabbits, guinea pigs, chickens, ducks, and sheep.

This former medical factory gives home to cutting edge arts in the shadow of a gas works.

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

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

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

Napoleon's childhood home is now open for people to explore the beginnings of France's short general.