In the neighborhood with the highest concentration of street art in San Francisco, the Mission’s cultural heritage may be best viewed through the work of its artists. The alleys here are gateways to discovery, where guerrilla "galleries" weave a colorful tapestry of influences and creative expression.
This is a pretty interesting article talking about the Dogpatch neighborhood in San Francisco and its up-and-coming status as a stronghold for art. It's interesting to see the differences between the art community here and in NYC for example, since here it's all about the freedom to explore. As the article says “Right now, there’s a lot of attention on S.F., but we’re not in a Chelsea-like environment with 100 galleries and hundreds of critics all watching what you’re doing. Here, you just do whatever you want.”