Several years ago, my brother and I were Austin and he decided to get a tattoo. After a consultation with an artist friend he came up with sepia-colored globe, surrounded by electrons, like an atom. We took it over to the tattoo studio and the tattoo artist said, "Man, this is more like fine art than tattoo art. Come back tomorrow."
That's the same feeling I got when I saw this photo posted on the street art blog, Bald Man is Watching.
The site is run by two brothers that are students on Capitol Hill, but they take photos all over the city. Their site is full of excellent photos and links to their Flickr page as well.
Check 'em out.