I was doubtful as to whether I would get to this stone as I had read that it is surrounded by field drains and electric fences, and indeed this is the case. It is also in the middle of a very boggy field!
I was fortunate enough to be given a plank by some very nice local people to use as a bridge to cross the drains and so I squelched my way to the stone.
It is around 2m tall and 2.5m wide with a hole at the bottom. This hole is large enough for a grown person to crawl through. I am sure that this was once an entrance stone to a tomb.
Like many holed stones this is said to have healing powers and it is still (infrequently) used as such. By passing through the hole you are said to benefit from its powers. The main use is for sick children.
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.