There is not one type of mountain architecture but several mountain architectures. Each station has its history with its specificities, the resolution of certain problems, in particular their integration into the landscapes. These resorts emerged from the mountains during the 20th century: new towns, sometimes exclusively dedicated to skiing. Terrific territories of invention for town planners and architects of the time. A look back at the extraordinary history of the creation of the great winter sports resorts in the Alps until today and their future development thanks to the new architects of the 21st century.