Lucie & Simon, a self-taught artistic duo out of France, have traveled the world photographing major metropolitan areas -- such as Times Square and the Louvre -- without signs of life. Their technique involves using a neutral density filter that allows for extra-long exposures, which removes moving objects like people and cars.

Don't miss the rest of their series, Silent World, or the short film that pairs their images with music.

[twistedsifter]