Porto, Portugal is one of those fantastic street art is around every corner, it's just part of the culture there. There are obviously established graffiti artists, like Hazul, but there are also lots of Have A Go Heroes as well. Here is my photo gallery dedicated to the street art of Porto. Now you just have to decide whether you prefer the art, or the crap graffiti. I think I prefer the rubbish ones. It's tempting to set up a blog dedicated to Crap Graffiti.