Dachstein, mountain massif of the northern Alps, Austria, reaching its maximum elevation at Hoher Dachstein (9,826 feet [2,995 metres]). Among the massif’s higher reaches are the easternmost and northernmost glaciers of the Alps, the largest of which is the Hallstättergletscher, 2 square miles (5.3 square km) in area. The Alpine scenery of the massif attracts skiers and mountain climbers, and the ice and limestone caves of the Dachsteineishöhle and Koppenbrüllerhöhle provide further attractions. Some 240 other caves have been identified on the massif.