Editor's note: Subways are not only an efficient and fast way of cutting across a big city while others are stuck in traffic up above, but they’re also sometimes connected to gorgeous stations—St. Petersburg, Russia and Stockholm, Sweden come to mind. And if you’ve never seen American photographer Walker Evans’s subway photos, taken in the 1930s with a secret camera, look them up. But in the meantime, enjoy this elegant collection and treat yourself to some lovely Subway wallpapers.