The multimedia exhibition ”The World of the Great Aletsch Glacier” in the Aletsch Arena reveals the secrets of the Aletsch Glacier, the longest glacier in the Alps at 23 km. Buried in the permanent ice of the enormous glacier are exciting facts and interesting stories. The exhibition about the world of the Aletsch Glacier lets the visitors in on many fascinating details about the glacier, offers exciting expeditions, playful explorations and quiet moments of pleasure with a view of the Great Aletsch Glacier. The exhibition caters especially to children. They are invited to join an expedition and receive a riddle book. They can explore the fascinating world of glaciers at their own pace and help find the missing professor.