I finally was able to get a picture of this insane permanent spot. It is on the Pasadena Freeway going south. It is painted on the overpass on the inside wall. (See pics of the outside wall by 82er and Yerba) When the city buffs the outside wall the workers leave the inside wall alone thinking that it is not visible. However, when traffic is bad you can get a nice glimpse of this driving under it.
Atlas CBS Pasadena Freeway
Atlas CBS Pasadena Freeway (zoom)
Another Atlas Masterpiece
Lacma Graffiti Picture: Atlas CBS
Lost - Graffiti in the City of Angels