Stockholm's Subway System Doubles As An Underground Art Museum

While you see some pretty cool graffiti in American subway stations, Sweden's stations are an underground art museum by comparison, and are even sometimes refered to as the world's largest art museum. Ninety out of Stockholm's 100 stations have murals, art installations or sculptures adorning them, some of them downright stunning and all transforming the feel of what could be a scary, cavernous place. You can see a slideshow of some of the art here.