Dun Aengus is a fort situated on the edge of a cliff at a height of 100 meters overlooking the Atlantic on the Aran Islands, Inishmore, County Galway. It consists of a series of concentric circular walls, the innermost; the citadel encloses an area approximately 50 meters in diameter with 4m thick walls of stone. These walls have been rebuilt to a height of 6m and have wall walks, chambers, and flights of stairs as well. Two walls of stone that form semicircles from one cliff edge to the other surround it. The innermost of these two walls encloses an area approximately 130m by 100m, and the outer wall encloses about 400m by 200m. (Flanagan 1992) Between the two “outer walls” is a small enclosure that extends as if an extension to the first wall. The restored walls are likely noticeable because of the use of mortar. The original walls were of drystone construction. In all the enclosed area is comprised of approximately 14 acres.
