Wikipedia
Sackwald
The Sackwald is a ridge, up to high, in the Lower Saxon Hills in the district of Hildesheim in the North German state of Lower Saxony. It is named after the village of Sack in the borough of Alfeld, the name meaning "Sack Forest".
The Sackwald is part of the geological structure of the Sack Basin or Sackmulde along with the Sieben Berge and the Vorberge.