Val d’Hérens stretches from the Rhone Valley near Sion to the foot of Dent Blanche, Dent d'Hérens, Mont Collon and Mont Blanc de Cheilon. Centuries-old villages with their typical dwellings lean against steep slopes.

The concrete dam of Grande Dixence, which has a height of 285 meters and is the world’s highest dam wall, is located in the side valley of Val d'Hérémence. It is made up of 6 million cubic meters of concrete. At its base, it is as broad as the Cheops Pyramid and twice as high and voluminous. The dam holds 400 million cubic meters of water, producing 1600 million kilowatt hours of electricity.

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