Knockinnon Castle (3)
Knockinnon is nearly very interesting, but isn't!  The reasoning behind that curious assessment is that is was apparently never finished.  Had it been, it would have been interesting, because it was going to be a fairly significant establishment.  Furthermore it was sited in a natural defensive spot and has excellent views up and down the coast, so it would have been a prominent landmark.  It is said that Knockinnon was started by William, 2nd Earl of Caithness, but due to his death at the battle of Flodden in 1513, construction stopped and it was never completed.

(The square pit was a quarry, probably post-dating the castle construction.)
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