Mantua is surrounded by lakes, ruled by the Gonzaga dynasty for three centuries, and staged Verdi's Rigoletto — a small city carrying an outsized cultural weight. This app-led scavenger hunt takes you through Mantua on foot, using phone-based riddles to guide you from one landmark to the next. No guide, no fixed start time. • Follow riddles to the Castello di San Giorgio, the Casa di Rigoletto, and the Pescherie di Giulio Romano — ducal...