León's cathedral is made of so much stained glass that the city glows — a medieval masterpiece on the Camino de Santiago. This app-led scavenger hunt takes you through León on foot, using phone-based riddles to guide you from one landmark to the next. No guide, no fixed start time. • Follow clues to the Catedral de León, Plaza San Isidoro, and the Convento de San Marcos — Gothic brilliance, Romanesque heritage, and Renaissance grandeur •...