doocaher

This impressive national monument on the southern side of the island ( 2.5km west of Cill Eanna) stands on the edge of the great cliffs. Its approaches are so well guarded by natural defences and by achevaux-de-frise, that it must have been well-nigh impregnable.

A century ago, Dr John O' Donovan measured the remains of the wall left after many cliff falls since its construction over 2000 years ago, and concluded that it was perhaps the biggest fort on the island at one time, though it is now smaller than the others.