On a boulder to the right of the roof marked with an X in blue, above Léon and to the right of L'Effet Pimousse, just below the viewpoint.
Access
From Recloses, take Le Chemin de la Butte Blanche up to the small path of l'Escalier to the left (blue circles) that goes up to the plateau; the boulder is near the top, on the right.