|The Grianan of Aileach, near Derry in
the Inishowen Peninsula of Co. Donegal, was the ancient
hilltop fortress of the McLaughlin and O'Neill Kings of
Ulster before it was destroyed by Murtough O'Brien in 1101
A.D. and subsequently abandoned. The view overlooks
Loughs Swilly and Foyle from the top of Grianan Mountain
. It was partially restored in 1870.