Stahleck Castle, UNESCO World Heritage Site, now a youth hostel, Bacharach, Rhineland-Palatinate, Germany Stahleck Castle, UNESCO World Heritage Site, now a youth hostel, Bacharach, Rhineland-Palatinate, Germany Stahleck Castle, UNESCO World Heritage Site, now a youth hostel, Bacharach, Rhineland-Palatinate, Germany Stahleck Castle, UNESCO World Heritage Site, now a youth hostel, Bacharach, Rhineland-Palatinate, Germany