The Grianan of Aileach hill fort in Inishowen, Donegal.
In mythology it is linked to the Tuatha de Danann who invaded Ireland before the Celts and built stone forts on top of strategic hills.
The Grianan of Aileach hill fort in Inishowen, Donegal.
In mythology it is linked to the Tuatha de Danann who invaded Ireland before the Celts and built stone forts on top of strategic hills.