London's most infamous, clever, and elusive street artist, Banksy, has somehow kept his identity a mystery for many years. Yet his art can still be found in spots around the city (if you can get there fast enough). This was taken at the "Cans Festival" a few years back, when street art overtook London's Waterloo Station. It's long gone by now, but with the help of the Banksy London Tour App, you can hunt down some of his latest works. And be sure to snap a photo ASAP—chances are it won't be there tomorrow.