The Eifel-Ardennes Green Route or Eifel-Ardennes Green Road (German: Grüne Straße Eifel-Ardennen, French: Route Verte Ardennes-Eifel) is a cross-border, tourist route, about 500 kilometres long, which links the Ardennes to the Eifel. It runs from France via Belgium and Luxembourg to Germany mainly on quiet by-ways.
For seveveral years I've been seeing signs for this route but never really bothered to look into it before now. It looks OK and would make a reasonably pleasant way to cross the Ardennes into the Eifel