Riverboarding Of Great Aletsch Glacier, Bernese Alps, Valais, Switzerland

Geography
The Aletsch Glacier is one of the many glaciers located between the cantons of Berne and Valais on the Bernese Alps located east of the Gemmi Pass. The whole area is considered to be the largest glaciated area in western Eurasia. The Fiescher and Aar glaciers lying on the east have similar extensions.
Except the Finsteraarhorn, all the highest summits of the Bernese Alps are located within the drainage basin of the glacier. The Jungfrau and Mönch constitute the northern boundary; the Gross Fiescherhorn and Gross Wannenhorn lie on its east side; finally the culminating point, the Aletschhorn (4,195 meters/13,763 feet) is located on the west side.
Before reaching the maximum flow, three smaller glaciers converge at Concordia (German: Konkordiaplatz):