Back Heinzenberg (Graubünden) ALS Heinzenberg (kabukiran) CEB Heinzenberg (Graubünden) German Heinzenberg GR NN Heinzenberg Swedish
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Heinzenberg (Romansh: Mantogna) is the western side of Hinterrhein valley in the Swiss canton of Graubünden between the Viamala and the narrow valley in Rothenbrunnen. The eastern side of the valley is called Domleschg. The region is named after the Heinzenberg Castle near the village of Präz.