There is not an architecture but of mountain architecture. Each station has its history with its specificities, the resolution of certain issues including their integration into the landscape. These stations have sprung up the mountain during the twentieth century: new cities, sometimes exclusively dedicated to skiing. Tremendous territories invention for planners and architects of the time. Back on the extraordinary story of the creation of the great ski resorts in the Alps until today and their future development with new architects of the twenty-first century.