Grianán of Aileach
The Grianan of Aileach (Irish: Grianán Ailigh, sometimes anglicised as Greenan Ely or Greenan Fort) is a hillfort atop the 244 metres (801 ft) high Greenan Mountain at Inishowen in County Donegal, Ireland.
The Grianan of Aileach (Irish: Grianán Ailigh, sometimes anglicised as Greenan Ely or Greenan Fort) is a hillfort atop the 244 metres (801 ft) high Greenan Mountain at Inishowen in County Donegal, Ireland.