Austin's Graffiti Park is a pretty unique attraction in the middle of the city. Right outside of the downtown area, in Castle Hill, the park is an old construction site that never was finished. As most unsupervised places in the middle of large cities find out, this soon became a spot for graffiti. And as the sit became more and more popular it is layered constantly with new artwork. Any given day you can find artists working with no fear of reprisal as the artwork here is now sanctioned. You will even find people taking pictures of new works and selling the prints as the artwork on the walls never stays long.