GraffitiThe best graffiti artists in the world are gathering in London's "Leake Street Tunnel". This tunnel is a canvas and a venue for countless graffiti pieces that are admired by visitors from all over the world. Step into the shoes of one of these artists and immortalize yourself in the tunnel. For this, you will need both a permit and the right spray cans. Then you can make a name for yourself in the city and maybe even become friends with the Bobby. Now