Grianan of Aileach is probably the best-known monument in
Inishowen, situated on a hilltop 800 feet above sea level. The
view from Aileach is breathtaking. The glistening waters of Lough
Foyle and Lough Swilly are clear, as is the form of the entire
peninsula. A windy and exposed place, Grianan has been a
silent witness to the history of Ireland.