When Peter White jets, sails or walks into a new city, it is the sounds, not the sights, which assail him. In this programme Peter explores the twists and turns of Marrakesh. He listens to local radio; he takes in the sounds of restaurants, travel systems and the voices of the locals. He also meets other blind people and uses their experiences of an area to understand it better and to appreciate the aural clues which help guide them.