Dun na Nighinn is one of the most impressive duns in Mid Argyll can be found on a rocky ridge alongside but hidden from the main Oban-Lochgilphead road, at the north end of the Kilmartin glen. The defensive south wall still stands 6 feet high, but is ruinous at its ends. The inner face reaches a height of 3 feet high. The entrance can be found in the north wall. The width of the walls are up to 10 feet thick. The eastern side too has had a defensive wall, but little remains of this, whilst on the west side, the steepness of the terrain appears to have provided adequate natural defense. A lower terrace on the south side of the dun was defended by a short stretch of walling. The dun is in sight of the larger hillforts of Dun Chonallaich and Creag A Chapuill. 

Access to the dun is quite easy, taking the old quarry road off the busy main road, on your right if you are heading north.

Here you can park your car safely and walk up to the bend of the quarry access road. Once at the bend leave the road and head north following the tree line up over rough ground until you find the ridge ahead of you, and the south wall of the dun.

A fabulous place to explore well worth the short walk.