A surrealist timepiece by the artist of melting clocks.

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

Down a cobblestone alleyway is a museum dedicated to Romanticism, with a secret garden.

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

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

The last of Amsterdam's original sea level markers remaining in place.

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

Marvel at the opulent Art Nouveau interior while dining on dirt-cheap French classics.

For more than a century, Parisians have come for affordable dishes in a grand converted train station.

Ornate and vibrant, this temple is a colorful place of worship for Columbus's Thai and Laotian communities.

Smallest house in Toronto sits on a lot meant to be just wide enough for cars to drive through.

An ancient Greek monument and a Byzantine church coexist inside this cave.

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

A dramatic art installation features a BMW flying out of a building in Rotterdam.

A giant yellow phallus sculpture hidden in the gardens of the Museum Boijmans Van Beuningen.

Inside this metro station is a section of the city's former medieval fortification.

The oldest skyscraper of Europe now stands dwarfed by the surrounding structures.

A bridge that has seen many reiterations over its lifetime.

From afar it looks like someone's hat blew into the water, but closer inspection reveals a giant floating sculpture.

An art installation memorializing a tram stop, which became a tram stop.

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

A statue of the second-tallest Dutchman in history.

A true Valhalla for cactus and succulent lovers.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.