From Rodersdorf, the route takes you through the green border, passing through small Alsatian villages with charming half-timbered houses. Descending gently by the Ill River, you reach Altkirch, the capital of Sundgau. In the medieval town centre, there is a delightful selection of cafes and restaurants. The stage continues to Mulhouse, the capital of technology museums in the tri-border region of France, Germany, and Switzerland.