This artistic fountain display pays homage to this area's theatrical history.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The world's oldest bookshop still in operation.

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

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

The world's largest wooden structure.

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

Designed by Gustave Eiffel before his famed tower.

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.

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

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

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

Engineering ingenuity during the battle of Gibraltar.

Single runway interrupted by a busy road that cuts across its middle.

There was a top secret plan during World War II to seal a group of soldiers inside the rock.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

An icon of International Style architecture on the outskirts of Rotterdam.

Old ships and machinery fill a historic harbor in the city that's home to Europe's largest port.

Built by crowdsourcing, this wooden foot bridge saved a part of Rotterdam that was languishing in wait of city funding.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

This bridge's unique architecture honors nautical heritage and encourages self-awareness.

Opulence and fantasy collide in this royal chair which is supposedly made with unicorn horns.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.