That is what I call a pile of stones

Tigh Cloiche or for those of you who don't have the Gaelic, 'house of stones'.
An impressive Neolithic chambered cairn on the slopes of Cleitreabhal. The stones that are flat here are the roof of the chamber.
We had actually just walked to a rather less significant pile of sotnes on the ridge on the left of this photo but thought it prudent to take in this on the way back up the hill to the car. 
Quite a bog trot aided a little by the hard frost stiffening up the bog a bit.