Austin Graffiti Park
Creative. Interesting. Peculiar. Impressive. A hidden Austin gem and (if you're interested in any of that) a must see! Also known as Castle Hill, Baylor Street Art Wall, and Graffiti for HOPE. While I don't know the "rules", the property is private so artists aren't allowed to just walk right up and spray paint the wall. Most of the art is tasteful and interesting. If nothing else, a great photo opp!