The Lammerklamm is a deep chasm about 30 km south of Salzburg, Austria. The Klamm – short for gorge – was carved by the Lammer River which cut a narrow cleft through the limestone of the Tennengebirge, the northernmost range of the Alps. The gorge widens downstream from the Oefen into a canyon, and the canyon soon widens into a narrow river valley. The entire Klamm is about 1.5-2km long.