New York, the city that never sleeps seems to be a statement true to most cities around the world. Take a look at this blog, Silent Cities, that captures the sleeping moments. These images feature some of the most noisy and crowded places in the world momentarily bathed in silence. There is something both serene and eerie about these photographs. They have images from Detroit (see the picture above), London, Berlin, and many more. Take a look for yourself.