Michael J. Wallace may start his bike rides in Baltimore, but he ends them on the moon, on a basketball court, or in the mouth of a dragon. He uses the streets of the city as a canvas, sketching out surprisingly detailed images by recording his progress with his phone’s GPS and a tracking program.

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Wallace says he didn’t invent GPS tracking art, but he’s the first practitioner I’ve seen and he definitely makes Charm City more charming. Baltimore seems like the perfect place for a deeply weird, home-brewed amateur art form that’s inextricably bound up with the city’s landscape. It is also, some might argue, the perfect place for this:

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Way more on Wallace’s WallyGPX site, along with information about how he plots his routes and how long each artwork took.