Flendie Clett Castle, Caithness
This castle was located on the island of Stroma.
The 1872 Object Place Name book description is as follows -
A creek, enclosed by an isolated huge portion of rock of the same name has a small portion of foreshore, is used by small boats occasionally. The summit of Flendie Clett to the same height as the main ??? feature on the coast. It is said o have been crowned by a castle
inhabited by the Vikings or Scandinavian pirates.