Well, what is this place? It's so odd. Anthony Weir lists it as a Megalithic Tomb? (with a question mark) and after seeing it I can see why. What stands here is a row of stones with a couple of smaller stones standing in front of them.
The main stones are quite massive. The largest is about 2m tall and 1.5m wide. the next largest is slightly shorter and slimmer. The main stones are arranged in a north-south alignment and are situated next to a low rise that blocks the views to the north.
I'm not sure what these were once part of. I suppose it could be that they were part of a tomb. Equally, it could be that the main stones were simply a stone row and the smaller stones were added at a later date.
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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.