The area probably takes its name from this holed stone. Like the Cloch-An-Phoill it is most likely a door stone from a tomb.
The hole is 15-20cm in diameter and beautifully formed. The whole stone is about 1.4m square and 25cm thick. One side is very smooth and the obverse is very rough.
This is another one of those sites I've wanted to return to for a long time now. It's a wonderful stone and its hole gives it very special status amongst Irish monuments. I love the fact that, by pure coincidence, the hole lines up with a big old tree on the horizon.
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From Ardee take the N2 south and turn west along the R165. Take the second left and continue for about 650m. The stone is just in the field on your left.
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.