Claim: The Hasselkop mountain located in Lower Saxony, Germany, which is mostly covered in grass and undeveloped, was used as a launching site for mail rockets testing.
Evidence: Hasselkopf is a mountain on the southern periphery of Braunlage, Germany. Hasselkopf 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.