Grianan of Aileach, Stone ringfort on Greenan Mountain, County Donegal, Ireland
The fort features circular stone walls measuring 4.5 meters thick and 5 meters high, with internal terraces connected by steps and passages within its structure.
The Northern Uí Néill constructed this royal stronghold in the sixth century CE, which served as a center of power for the Kingdom of Ailech.
The site holds connections to Irish mythology, as tales tell of the god Dagda ordering its construction as a burial monument for his son.
The monument includes informational panels explaining its architectural features, while paths allow visitors to explore the structure and surrounding archaeological remains.
The fort stands 244 meters above sea level, offering views across Lough Foyle and Lough Swilly, with Bronze Age ramparts visible beneath the main structure.
Location: County Donegal
GPS coordinates: 55.01667,-7.43333
Latest update: May 27, 2025 06:50
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