Grotte et Trou de la Mule are located on the Cirque des Etournelles close to Grotte de la Table in Mont-Salève in Haute-Savoie department of France. The closest lower and upper entrance of the grotto formed a naturel arch below the promontory of the rock called The Sphinx. Trou de la Mule is an opening pierced at the bottom of the small grotto on the blind side of the promontory.