In this small forest, we cross the Old Thur. An arm of this river is also called the canal of the 12 mills, of which only one is still in activity (produces electricity) in the forest of Niederhergheim near Colmar. Some buildings still exist in Meyenheim or Munwiller, while others have completely disappeared. The old Thur river crosses the Lauch river in Eguisheim, before Colmar.