Hasselkopf is a mountain on the southern periphery of Braunlage, Germany. It is 612 m high.
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. One exploded in an accident, killing three.
Wikipedia https://en.wikipedia.org/wiki/Hasselkopf
Address B4, 38700, Germany
Coordinates 51°42'48.069" N 10°37'1.169" E