Locarno Locarno and its Piazza Grande turn into the world's most beautiful film festival in August each year.  The International Film Festival is observed by by a thousand journalists and two hundred thousand spectators and is not the only trump card of this city.The plazas and arcades of the old town, the pilgrimage church of Madonna del Sasso and above all, Switzerland's mildest climate speak for this city on Lake Maggiore.