Hong Kong has a perfect storm of huge concrete walls, secluded back alleys, and social freedom that allows street art to flourish. Wander around the downtown area and you’ll stumble on small stencils and tags on walls and sidewalks. Turn a corner and find yourself facing a mural, creeping up the walls of a building or a flight of stairs. Even the trees join in to decorate the city’s spaces, engulfing them with a complex network of roots and vines. Welcome to the concrete jungle.