Museum celebrating the ocean, with the largest wunderkammer dedicated to sea exploration.

This massive blockhead sculpture hides an entire library.

The celebrated eyesore created by starry-eyed sweethearts.

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.

Ordinary art transforms to extraordinary thanks to locals' quirky sense of humor.

Former hunting lodge of a duke who was an avid collector of impressionist works.

A French artist's vague warning hangs over Belleville.

This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.

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

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

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.

A bright little alley in La Boca is a part of tango history.

This historic, palatial theater is now one of the world’s most beautiful bookstores.

This necropolis is home to eclectic funerary art and is the final resting place for much of the city's nobility.

This attraction is devoted to the wonders of steam power and features a replica of one of its most public disasters.

This Brazilian town built by Freemasons is full of colonial Masonic architecture and symbolic imagery.

You feel like you're in a forest, but you're actually walking amidst the branches and trunks of a single giant tree.

A 125-meter long "tribute to the Brazilian people."

Stare out over the lagoon and beyond from this 10th-century campanile on the island where the city of Venice began.

This cathedral hides a sculpted dog that determines your fate and an unexploded shell from World War II.

This bustling Italian plaza is built on the ruins of an ancient Roman amphitheater.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

A space dedicated to contemporary art and culture, co-chaired by fashion icon Miuccia Prada.