Serendipitous Art: Poster Fragments, San Francisco (April 3, 2014)
On a walk along San Francisco's Valencia St. a few weeks back I found a large wooden board pasted over with bills and posters overlaid with graffiti and more bills and posters. Some were stapled to the board, some glued. Once in a while, I imagine the whole thing is cleared, leaving behind whatever sticks. Here's another view of the board. Unintended art, Serendipitous art.