Monte Rosa or Monte Rosa Massif (the Italian toponym is also used in German and English, while in French the mountain is called Mont Rose; in the Walser language, in Gressoney-Saint-Jean it is called De Gletscher, while in Alagna Valsesia it is called Der Gourner is the largest massif in the Alps and the second in height, it is also the highest mountain in Switzerland and is particularly famous for its east face or the Macugnaga side, the highest wall in the Alps and the only of Himalayan size. It is located in the Pennine Alps and extends over Italian territory (in the municipalities of Alagna Valsesia, Ayas-Champoluc, Gressoney-La-Trinité, Gressoney-Saint-Jean, Macugnaga and Valtournenche) and Swiss (in the municipalities of Saas-Almagell and Zermatt) . Punta Dufour, with its 4,634 meters, is the highest peak of the group and among all the countries surrounding the massif it is visible only from the town of Macugnaga. It was thus named in homage to the Swiss General (and great cartographer) Guillaume-Henri Dufour, 1787 – 1875). On Punta Gnifetti is located the highest alpine refuge in Europe, the Capanna Regina Margherita (at an altitude of 4,554 meters), which is also home to a meteorological station and research center on the effects of high altitude on the human body.