One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

Once a sewer culvert, this road tunnel now offers cyclists and pedestrians a subterranean stroll under the C&O Canal.

This brick-lined pedestrian walkway was once a railway tunnel used during the Civil War.

A repurposed railway tunnel with otherworldly acoustic characteristics.

A mining town, now abandoned, was built in a canyon so narrow that the railroad ran right through the hotel lobby.

A museum dedicated to linguistics, from how babies learn to talk to endangered and extinct languages.

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

This recessed garden protects thousands of mountain plants by creating its own microclimates.

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

An odd museum dedicated to French fakes.

This Parisian gem is one of the most incredible ethnographic museums in the world.

This little-known relic crypt holds stolen parts of a Roman Empress.

Beggars were miraculously "cured" of their fake ailments when they returned home to this 17th century Paris slum each night.

Architect Le Corbusier built his friend a cubist house to match his impressive collection of cubist art.

In this Parisian garden's grotesque former life as a zoo it fed exotic animals to the bourgeois and put humans on exhibit.

Once a 19th-century brasserie, this McDonald's exterior celebrates Alsatian design and the "King of Beer."

This frog-themed restaurant was frequented by Picasso, Saint-Exupéry, and more.

An immersive projection art installation uses sound, scale, and light to take visitors inside classic works of art.

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

Where the high court feasted, frolicked, and high courtesans put their royal lovers' diamonds to the test.

The narrowest street in Paris.

This banal Parisian entranceway is not what it seems.

Walk through spectacular aisles of hanging meat and wagon wheel–sized cheese at the world's largest wholesale food market.

Natural history museum celebrating biodiversity with a parade of taxidermy animals.