I would not have known of these cairns had it not been for C. Corlett's book on Rathdown. They are situated on the north shoulder of The Great Sugar Loaf mountain and give superb views over the north Wicklow Mountains and north towards Howth and Lambay.
To the south the possible Mother Mountain (The Great Sugar Loaf) towers up in a most impressive manner. A beautiful spot to sit and watch the world from.
There are two cairns here; one is very small and does not seem to be a burial cairn but the other is certainly large enough to have been. The top of the larger one is concave as if it has been robbed out from the top, perhaps by people searching for whatever may have been buried beneath it.
From Enniskerry take the R760 south and then the R755 south. After about 2km turn left and pass to the south of the Great Sugar Loaf Mountain. After about 700m you will see a car park on the left. Park here and follow the path up and over the west shoulder of the mountain. Keep walking past the peak and you will see the cairns beyond.
This is an explanation of (and a bit of a disclaimer for) the coordinates I provide.
Where a GPS figure is given this is the master for all other coordinates. According to my Garmin these are quite accurate.
Where there is no GPS figure the 6 figure grid reference is master for the others. This may not be very accurate as it could have come from the OS maps and could have been read by eye. Consequently, all other cordinates are going to have inaccuracies.
The calculation of Longitude and Latitude uses an algorithm that is not 100% accurate. The long/lat figures are used as a basis for calculating the UTM & ITM coordinates. Consequently, UTM & ITM coordinates are slightly out.
UTM is a global coordinate system - Universal Transverse Mercator - that is at the core of the GPS system.
ITM is the new coordinate system - Irish Transverse Mercator - that is more accurate and more GPS friendly than the Irish Grid Reference system. This will be used on the next generation of Irish OS maps.