Dun Aonghas is a half a circle of four dry-stone walls and a “chevaux-de-frise” constructed from massive limestone blocks on the edge of vertical sea cliffs. The hundred metre drop to the Atlantic Ocean and wonderful construction make it the most impressive site in Celtic Europe. It is thought to be iron age.

I tried to to buy Tim Robinson’s 830-page ‘Stones of Aran’, out of print – an early psycho-geography
exploration.