The remains of the Castle can be visited
Hohnstein Castle

The Hohnstein Castle Ruin, a former hilltop castle, stands at approximately 382 meters above sea level near Neustadt in the Nordhausen district of Thuringia.
History+
The origins of Hohnstein Castle are dated to the mid-12th century, although older research suggested its creation around 1120. The castle was transferred in the mid-1170s from the Welfs to the Counts of Ilfeld, who subsequently called themselves Counts of Hohnstein and chose the site as their ancestral seat. The first documented mention occurred in 1202. Under Count Elger III, the castle was razed around 1219. After a period of prosperity in the 13th century, a division of inheritance in 1315 led to a loss of significance.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: Roland Neubert, Halle (Saale)
This description draws on the facts documented in the linked Wikipedia article; Wikipedia content is licensed under CC BY-SA 4.0. Wording and editing: Mobile History.
Location: 51.5700, 10.8375