Alps are the highest mountain range in Europe. They stretch across France, Switzerland, Liechtenstein, Italy, Germany, Austria, and Slovenia, from the French Riviera to Vienna. They were formed during the Alpine-Himalayan orogeny 40-60 million years ago, due to the collision of the African plate with the Eurasian plate. The current shape has also been significantly influenced by the ice ages over the last 2 million years. They are divided into two main subranges - the Western Alps (with the highest Alpine and European peak Mont Blanc, 4810 m) and the Eastern Alps (with the highest peak Piz Bernina, 4049 m, but the most prominent Grossglockner, 3798 m). Additionally, the Alpine foothills and Jura are considered external subregions.