Heidehöhe (also called the Heideberg, near Gröden), a hill on the Brandenburg-Saxony border in Germany
On 15 April 1945, the school closed and young Martin was advised by a party functionary in Munich, named Hummel, to try to reach his mother in the still German-occupied hamlet of Val Gardena/Gröden, near Selva/Wolkenstein in Italian South Tirol.