Pic Tyndall - South Ridge “Deffeyes-Carrel” route
Matterhorn's South Face
Blue line: Cresta de Amicis (De Amicis-Frusta, 1905, historical climb; Cretier-Gaspard-Ollietti, 1933, direct route)
Black line: Deffeyes-Carrel route
Graphic processing on a photo taken near Torgnon on August 2012