Cahergal Fort is a restored but very impressive stone fort thought to have been built originally around 600AD. It is located a short distance from the superb Ballycarbery castle, both of which can be found close to Cahersiveen County Kerry.
The forts internal diameter is approximately 25 metres, the outer walls are 5 metres thick and rise to a height of 4 meters. Stairs are built into the inside face of the outer walls and climbing them makes for a great view of this site and Ballycarbery Castle in the background (second image) .
While the purists whould have you believe that this site is "too clean", for me (and great work by the OPW) this dry stone wall fort is one of the best examples of an early medieval stone fort that you can find in Ireland.