The remains of the castle can be visited
Brackenburg Castle

The Brackenburg castle remains, a former hilltop castle, are on a forested basalt cone near Meensen in Lower Saxony. Today only remnants of this complex remain.
History+
Duke Ernst I had the Brackenburg built between 1303/04 and 1353 to protect the military and trade route from Hann. Münden to Göttingen from Hessian incursions. The first inhabitants were the Lords of Stockhausen. In 1370, Duke Otto the Bad pledged the castle to the brothers Hermann and Heinz von Kolmatsch. A siege in 1411 by Duke Otto the One-Eyed led to the capture and damage of the castle, which he gifted to his wife Agnes in 1427. From the mid-15th century, the Lords of Gieme were the owners, followed by the Lords of Boventen and the Junkers von Grone. During the great urban feud in 1486, Brackenburg was burned down. Later, it passed into the possession of the Lords of Adelebsen and by the end of the 16th century, to the Lords of Bodenhausen. Afterwards, the castle fell into oblivion until it regained attention in the 18th century through a play.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://de.wikipedia.org/wiki/Datei:Brackenburg_Mauer.jpg
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: 51.4331, 9.7475