The first green space constructed on an elevated viaduct.

This Parisian fountain is a little bit fantasy and a little bit nightclub.

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

France's national museum of scientific and industrial instruments.

A surrealist timepiece by the artist of melting clocks.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

A museum of magic with a Sadist past.

This Parisian café sticks almost exclusively to an ethos of reuse.

A mechanized clock where a man fights off a dragon, crab, and rooster.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

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

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

Notorious artist squat renovated into legal studios.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

For a brief time in 1960s France, families could climb into a tiny submarine and be pulled along an underwater journey.

This historic island prison holds one of the dungeons from the Count of Monte Cristo even though it is a work of fiction.

Balconies that have a most unusual accent.

An often-shuddersome journey into a low-tech, robotic themepark.

Every Sunday, Bogotá turns 75 miles of its city streets into a bicycle superhighway.

Outdoor escalators and art have helped change what was once a notoriously dangerous part of Medellín.

In the middle of one of South America's most historic walled cities lies a bar with an enormous collection of Soviet memorabilia.

This exceptional home was a 32-year labor of love by a man determined to build his wife the most beautiful stone house in the world.

Colombia's biggest botanical garden contains plants from all across the country.