The route follows the profile of the mountain, winding in and out along its rugged face, scarped and blasted so as to form the road. At one place it passes along a gallery about six hundred feet in length, cut through a precipitous rock overhanging the river, which dashes, roaring and foaming, more than a thousand feet below, through the rocky abyss of the Gorge de l'Infernet. Perhaps there is nothing to be seen in Switzerland finer of its kind than the succession of charming landscapes which meet the eye in descending this pass. Beyond the village of Freney we enter another defile, so narrow that in places there is room only for the river and the road; and in winter the river sometimes plays sad havoc with the engineer's constructions. Above this gorge, the Romanche is joined by the Ferrand, an impetuous torrent which comes down from the glaciers of the Grand Rousses. Immediately over their point of confluence, seated on a lofty promontory, is the village of Mizoën--a place which, because of the outlook it commands, as well as because of its natural strength, was one of the places in which the Vaudois were accustomed to take refuge in the times of the persecutions. Further on, we pass through another gallery in the rock, then across the little green valley of Chambon to Le Dauphin, after which the scenery becomes wilder, the valley--here called the Combe de Malaval (the "Cursed Valley")--rocky and sterile, the only feature to enliven it being the Cascade de la Pisse, which falls from a height of over six hundred feet, first in one jet, then becomes split by a projecting rock into two, and finally reaches the ground in a shower of spray. Shortly after we pass another cascade, that of the Riftort, which also joins the Romanche, and marks the boundary between the department of the Isère and that of the Hautes Alpes, which we now enter. More waterfalls--the Sau de la Pucelle, which falls from a height of some two hundred and fifty feet, resembling the Staubbach--besides rivulets without number, running down the mountain-sides like silver threads; until we arrive at La Grave, a village about five thousand feet above the sea-level, directly opposite the grand glaciers of Tabuchet, Pacave, and Vallon, which almost overhang the Romanche, descending from the steep slopes of the gigantic Aiguille du Midi, the highest mountain in the French Alps,--being over 13,200 feet above the level of the sea.