The site of Locuon, a small town in the north of the town of Ploërdut, is exceptional: it is home to the only granite quarry whose traces of ancient exploitation are still visible today! Meet at 2:30 p.m. in front of the village church of Locuon with Jean-Paul Eludut and Joseph Le Guernic. Free. Duration: 1h30. Reservations required 02 97 23 23 23. Guided tour "according to the sanitary conditions in force".