The origins of Grianán Ailigh dates from 1700 BC. They are connected with the people of the Tuatha de Danann who invaded Ireland before the Celts and built stone fortress on top of strategic hills. People you worshipped Dagda (the Good God, although it was a man) who ordered the construction of the stone fortifications that served as a burial place and monument for his dead son.
Round the Fort was rebuilt largely without a solution to remain the closest to the original building. The interior has three terraces , in front of which was built a wooden structure to give shelter to people. During the early rulers of Ireland (between the eighth century BC and the XII century BC) was the center of cultural and political life of the island. In the second century ad he was placed on the world map of Claudius Ptolemy. In 1101, the castle was destroyed by troops Murtagha O'brien, king Munsteru.
Now you can watch reconstructed in the XIX century walls surrounding the interior of the Fort circle with a diameter of 23 meters. Dry stone walls have two entrances, and a huge terrace will allow you to get to the top of the fortifications. In 2014, the gate was open and no problems.