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

The defensive tower was built centuries ago to warn locals of Berber pirate attacks.

Red, white, and blue painted steps along with a Union Jack celebrate the outcome of Gibraltar's 1967 referendum.

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

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

The world's largest wooden structure.

The oldest monument in Marrakesh and the city's only surviving example of Almoravid architecture.

Vast stretch of tide-pools with a unique Moroccan charm.

A statue honors the local legend that the devil helped build St. Mary's church after being tricked into thinking it was going to be a wine bar.

The bells remain in a shattered heap exactly as they fell when the church was bombed in World War II.

The small alleys in Lübeck's Old Town are a result of medieval urban sprawl.

This German museum devoted to the simple wonders of salt is actually built over an old saltworks.

Bored potato-guarding Nazis etched their thoughts onto a brick storage building in Copenhagen's Meatpacking District.

An art-filled botanical garden and former dyeworks hiding in plain sight.

This mountaintop mariner’s church is packed with model ships and nautical art while hosting an annual maritime festivity for the townsfolk below.

One of the oldest and largest wooden churches in France was very evidently constructed by shipbuilders.

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

The gilded, masterful astronomical clock will calculate time, dates, and planetary positions for thousands of years to come.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

Hans Christian Andersen for the postmodern world.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

The world's oldest bookshop still in operation.