London, UK

Shoreditch in East London has been the epicentre of British street art since the early 2000s, when Banksy began leaving stencilled rats and satirical pieces on its Victorian brick walls — several of which survive today behind perspex protection panels. Brick Lane and its surrounding streets host works by Zabou, ROA, and an ever-changing rotation of international artists who treat the area as a live sketchbook. The annual Upfest festival in Bristol draws tens of thousands of visitors and has helped establish the UK as one of the world's premier street art destinations, with Banksy's hometown of Bristol rivalling London for sheer density of landmark pieces.