I have always enjoyed seeing the use of urban structures as canvases, this often comes in the form of graffiti, but is increasingly being supported by local governments. As a kid, I remember seeing the murals of Philadelphia and thinking they were the coolest thing, they were so large and colorful you couldn't help but notice them. Philadelphia was one of the early supporters of authorized murals and founded their Mural Arts program in 1984 as part of a larger Anti-Graffiti e