Out of view from the valley floor far below lies the longest and most voluminous glacier in the European Alps. The Aletsch Glacier is a seemingly never-ending, 23km-long swirl of deeply crevassed ice that slices past thundering falls, jagged spires of rock and pine forest. It stretches from Jungfrau in the Bernese Oberland to a plateau above the Rhône and is, justly so, a Unesco World Heritage site.
