Watch Aletsch Negative (2019) : Full Movie Online Free The Aletsch Glacier is the longest and largest glacier of the Alps. According to glaciologists, most glaciers will have disappeared by the end of this century, and only bits of the Aletsch will remain. Through a journey into the body of the glacier the film offers a compelling and unsettling visual experience in which our perception of the nature of the images we see, scale and temporality are questioned.