It is situated approximatively 10 km southeast of Sangerhausen.
Blankenheim, Saxony-Anhalt, a municipality in eastern Germany, part of the Verwaltungsgemeinschaft Allstedt-Kaltenborn.
From there the Helme – now in the state of Saxony-Anhalt – continues eastwards flowing through Roßla towards Allstedt, where it then swings south and enters Thuringia again.
Since 1 January 2010, it has been a part of the town Allstedt.
Six months later, on 3 July 2005 Pölsfeld left for the Verwaltungsgemeinschaft Allstedt-Kaltenborn.
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On 1 December 2005 Riestedt followed, coming from the Verwaltungsgemeinschaft Allstedt-Kaltenborn.
She married on 28 February 1526 in Königstein to Wolfgang, Count of Stolberg-Stolberg (1 October 1501 in Stolberg – 8 March 1552 in Allstedt).
The biosphere reserve has an area of 30,034 hectares and lies in the county of Mansfeld-Südharz on the territory of the towns of Allstedt and Sangerhausen and the municipalities of Berga, Südharz and Wallhausen.