Our streets, townscapes and parks are what can make or break urban living. As we all become more hemmed in by the tide of intense urbanisation, beauty, especially that imparted by street art, becomes more important. Whether as a talking point between complete strangers or as a witty comment on urban living, street art in all its forms can transform our cities. Here is a slideshow containing diverse and amusing street art. I am grateful to the coolhunter for many of these.