The Jungfrau-Aletsch area is located in the eastern Bernese Alps in the most glaciated region of the Alps. It was inscribed as a UNESCO World Heritage Site (Swiss Alps Jungfrau-Aletsch) in 2001 and further expanded in 2007. Its name comes from the Aletsch Glacier and the two summits of the Jungfrau and Bietschhorn, which constitute some of the most impressive features of the site. The actual site (after the extension) includes other large glacier valleys such as the Fiescher Glacier and the Aar Glaciers.