I love this billboard assembly, traveling by car, its right as you come off the Fremont Bridge and plunge into the series of ridiculous stop-sign intersections that lead you from the freeway into the tiny streets of NE Portland.
Its a huge ass billboard, accessible from ground level, at a major intersection, ripe for vandalism. It somehow manages to attract awesome tags like the ones above instead of the silly lil' gangbanger bullshit that seems to permeate the city.
Here's a couple other shots of the same billboard during the summer of '08. These two stood side-by-side all summer long.
Pics borrowed from "The Impression That I Get's" photostream.
Update: Looking through old pictures, I found another one from the spring of '07.