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

Montmartre's sole surviving windmill became an iconic landmark for 19th-century painters, artists, and bohemians.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the 20th century.

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

During the summer months, giant teddy bears take over Paris near Les Gobelins metro station.

The video game-themed street art first popped up in the French city.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

Original cabaret handbills, posters, and feline artwork are a purrfect highlight of the Museum of Montmartre.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

Cozy basement bar sports an inventory of over 2,000 beers.

Now a museum, this building was once a 14th-century monastery and the place where the founder of the Dutch nation lived and was assassinated.

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

The largest madrasa in Morocco once housed more than 900 students within its exquisite walls.

One of the two original gateways into the Kasbah, this gateway is a nesting site for storks.

Deliberately hidden for centuries, the magnificent Saadian Tombs were eventually uncovered in 1917.

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

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

Each time a baby is born in Ghent, these streetlights flash in silent celebration.

Potato-peeling mannequins, Inca art, and a dangling tuber mobile help trace the history of fries at this Belgian museum.

This bird-loving brewery is situated in an old municipal bathhouse, nestled beside a 300-year-old windmill.

Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

The mirrored section takes the shape of Hebrew characters when viewed from above.