The first partially complete dinosaur skeleton was discovered here, forever changing the world's view of the ruling reptiles.

This noble mash-up in eastern Luxembourg is part Medieval, part Renaissance, all castle.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

Once the local rulers had gone these enchanting ruins housed common folk in an almost real life fairy tale.

This bronze statue of Martin Luther King was placed in the park without permission.

This massive mural by famed pop-artist Keith Haring was hidden for almost 30 years until its 2018 rediscovery.

Amsterdam's former hotspot for public executions and dissections.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

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

This unattributed sculpture in Amsterdam is hiding in plain sight.

This cheese shop also houses a museum devoted to Dutch dairy.

Famed for its pie, this eatery has a hidden tunnel that allowed Catholics to secretly walk to church during the Reformation.

A Portuguese Jewish cemetery filled with stunning grave monuments that date back to 1614.

The history and future of cannabis.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

A curious collection dedicated to human and animal anatomy and pathology.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

Museum preserving torture methods from the past.

A floating cat sanctuary on an Amsterdam canal.

The world's only museum devoted to the wonders of fluorescence.

For more than a century, revolutionary graffiti has marked the wall of a Parisian church.

One of Jeff Koons’s largest sculptures and his first commemorative work.