The Aletsch Glacier in the Swiss canton of Wallis is the best-known as well as the longest and biggest glacier in the entire Alps. Starting at a height of about 3800 meters in the Jungfrau-region of the Bernese Alps the glacier reaches over 22 kilometers towards the Massa river, which itself flows into the Rhône. The Aletsch Glacier as well as the adjacent Aletsch Forest make up the biggest part of the UNESCO World Natural Heritage site Swiss Alps Jungfrau-Aletsch.
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Coordinates: 46.442222, 8.077222