Auto-Pรฉdestre Mertzig – Turelbaach Castle November 8, 2025December 7, 2025 Jonny OrrLeave a comment 9km - Easy / medium. The newest Auto-Pรฉdestre trail is a gentle countryside loop crowned by one of Luxembourgโs most curious landmarks: the water-ringed turrets of the Chรขteau de Turelbaach.