Tennengebirge

The Tennengebirge, an extension of the northern Alpine chain, is a range lying to the north of the western end of the Niedere Tauern, containing many caves, especially those formed in the ice, and large sink holes. The Tennengebirge was originally part of the same massif as the neighboring Hagengebirge to the west, but in the course of time the River Salzach carved a passage between the two - the gloomy defile now known as the Lueg pass.