In the 15th century the castle was owned by the Keith family, who were in the midst of a feud with the Gunn family. After several murders and revenge murders, Helen Gunn of Braemore, was abducted by Dugald Keith who lived in the tower.
At the time she was betrothed to another man, and she either jumped or fell from the tower trying to escape. Helen Gunn is now said to wander the tower as a Green Lady.
The Green Lady seems to be a common ghost in many ancient residencies, and can be seen as a folklore motif. See the Castle of Mey for a similar legend.
Directions: Off A99 Ackergill North of Wick.