Claim: The Hasselkop mountain located in Lower Saxony, Germany, is mostly covered in grass and undeveloped, and was used by Gerhard Zucker to unsuccessfully attempt to demonstrate the use of mail rockets.
Evidence: Hasselkopf is a mountain on the southern periphery of Braunlage, Germany. Lower Saxony, Germany The hill is mostly covered in grass and undeveloped, but its northern slope has a short ski lift and can be used for downhill skiing in the winter months. On 7 May 1964, the hill was used by Gerhard Zucker to unsuccessfully attempt to demonstrate the use of mail rockets.