To be privately owned
Unterheiligenhoven Castle (Ruin) (Heiligenhoven)

The ruin of Unterheiligenhoven, also known as Heiligenhoven Ruin, is a historic structure in the Oberbergischer Kreis in North Rhine-Westphalia. It is amidst a landscape of ponds fed by the Lenneferbach stream.
History+
The origins of the main castle date back to the 15th century, while the outer bailey was built in the 17th century. The complex served as the meeting place for the Niederheiligenhoven feudal and manorial court. Access to the outer bailey was once via a bridge. A part of the castle's southeastern section collapsed in 1929.
Source: Wikipedia · Licence: CC BY-SA 4.0
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: 51.0063, 7.3611