What is "breitentalskopf"

The Breitentalskopf is a hill in the Harz Mountains of central Germany, that rises southeast of Sieber in the district of Osterode am Harz in Lower Saxony. It is 579.1 m high and separates the River Sieber from the Breitental valley (with its stream, the Tiefenbeek), that gave the hill its name. Towards the southeast is the ridge of the Aschentalshalbe.