All it takes is one bike ride to transform Baltimore into a screenshot from the ubiquitous game Angry Birds.
Using his pedals and a GPS, the brilliant Twitter user @WallyGPX spends his time plotting geoglyphic drawings across the Maryland city (and others).
He's made Angry Birds, Donkey Kong, and a host of other awesome illustrations. Check TwitPic for the rest!
WallyGPX [TwitPic via @AngryBirds]