Westhessische Senke
The Hahn is a -high basalt knoll in the district of Schwalm-Eder-Kreis, within the town of Edermünde-Holzhausen, in Hesse, Germany. Like many other basalt outcrops in the West Hesse Depression, it is the neck of an extinct Miocene volcano, the rest has been eroded. A small medieval tower castle once stood on the hill.