Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

Hundreds of dwarf beeches create an unusual, haunting forest in the north of France.

A neighborhood church's unusual abstract stained glass was the final project of avant-garde artist Jean Cocteau.

For over 300 years this little carving has been the city’s good luck charm.

The mental institution where Van Gogh created some of his most famous work now allows guests to walk in the artist's footsteps.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

Even France's favorite aquatic son Jacques Cousteau, couldn't get to the bottom of it.

Walk through living pictures and music in the Cathedral of Images.

The world's tallest bridge is also possibly the most elegant.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.

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

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 is expected to be completed in 2026—a century after the death of its architect.

Giant topiary dog once played a role in a terrorist bomb plot.

Two towns are linked by an engineering marvel masquerading as a boring suspension bridge.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Large collection from the 3rd millennium BCE.

Monasteries on rock pillars, once accessible only by frayed ropes.

The hallucinogenic center of the ancient world.

This legendary city has been a tourist attraction for centuries.

Every inch of this chapel is covered in craftsmanship from across the world.

The world's most active stratovolcano is almost always erupting.

Built in 1512, the oldest cathedral in the Americas.