The world’s largest street art museum.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

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

Cat art as far as the eye can see.

Christ's blood allegedly preserved in a Belgian town.

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

A little sculpture with a large wardrobe.

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

Climb inside an iron crystal magnified 165 billion times its normal size.

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

Tables of secondhand books fill the inner courtyard of this 17th-century stock exchange.

This triumphal arch celebrating the Sun King's conquest of Lille is a masterpiece of military architecture.

Museum in a swimming pool where the water still flows.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Paris' linguistic guide to the international language of, yes, love.

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

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

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.

France's national museum of scientific and industrial instruments.

With a history of slaughter, feast, and famine, remnants of the pork industry decorate this area--even its church.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

This Paris art space celebrates the creativity and ingenuity that springs from abject poverty, especially in Africa.