Half way to the Réou d'Arsine cirque there's a little lake called "Lac de la Douche". It is small and does'nt get many sun because of the huge mountains around. But it worths the hike as much as the blue rivers of Arsine at the end of the trail.
Lac de la Douche, Ecrins, Hautes-Alps, France. @ 2014 - FB Page