The Crevasse = Cool. "Street Art," No Way

This is a cool piece by German artist Edgar Müller. It looks like a crevasse, get it? As Doug Henning would say, "It's an illusion!" But I really take issue with the fact that it's being referred to as "street art". Yes, it's on a street (I guess?). No, that does not make it "street art." I bet they got a permit to do it. Silly Germans.