The Via Ferrata Tour d'Aï is a short yet intense climb located in Leysin, Switzerland. Starting from the Berneuse mountain station, climbers descend towards Lake d'Aï and then ascend to the start of the via ferrata. The route follows the 'Voie des Vires' over ledges, climbs through a chimney, and ascends a vertical to overhanging wall, leading to the summit of Tour d'Aï at 2,331 meters. The descent follows an exposed, marked path over the southeast ridge to Chalets d'Aï, from where climbers can either ascend back to Berneuse or descend to Leysin-Feydey. The via ferrata is well-marked and offers breathtaking panoramic views of the Vaudois Alps and Lake Geneva.