While some 60% of Switzerland are in the alpine region (stretching from the Lake of Geneva in the southwest to Grisons in the southeast), another 30% are hills and relatively flat valleys carved out by glaciers called "Mittelland" [midlands] (400 to 900 m [1300 to 3000 ft] above sea level) stretching from the southwest (Lac Lé = Lake Geneva) to the northeast (Bodensee = Lake Constance). The remaining 10% form a chain of older mountains called Jura (along the western border to France, not exceeding 1,600 m [5300 ft] above sea level).