
Two boys stand in front of a wall with graffiti at the Batman's Alley in Sao Paulo, Brazil, on March 29, 2017. Batman's Alley is a popular tourist destination because of the dense concentration of graffiti that line the streets. (Xinhua/Li Ming)

Two boys stand in front of a wall with graffiti at the Batman's Alley in Sao Paulo, Brazil, on March 29, 2017. Batman's Alley is a popular tourist destination because of the dense concentration of graffiti that line the streets. (Xinhua/Li Ming)