French artist and filmmaker Julien de Casabianca had the project, nammed Outings, to integrate some characters of classical art paintings on city walls and to make it street art work. It became a worldwilde collaborative project.
flower steps in Ewha, Korea That was one thing that was really cool in Korea. They had beautiful murals all over the place! All of the walls around the military bases had murals, sides of buildings usually had murals… It was just beautiful!
Fence Art - 25 pieces of art using a backyard fence as the canvas
Turn a boring chain link fence into a work of art. Artist Katie Daniels did this installation. The original site seems to be gone, but you could do something similar by wrapping wire and metal grilles or by yarn bombing a fence.