Monument or ancient site
Grianan of Aileach
Co. Donegal
About Grianan of Aileach
Grianan of Aileach is a historic hillfort atop Greenan Mountain in County Donegal. Believed to date back to the 1st millennium, this ancient site offers breathtaking views of Lough Swilly, Lough Foyle, and the verdant landscape of Ireland's northwest. The circular stone fort, associated with the Tuatha Dé Danann and the Kingdom of Aileach, holds a prominent place in Irish folklore and history.