This definitely gets the Wierdest Site Yet Visited Award. I can certainly see why it is just marked on the maps as 'Stones', who would want the responsibility of deciding what this is!?
As you drive along the road towards it all you can see is a chair like thing - a large horizontal slab with a reclining back. As you walk up to it all you can see is a chair like thing. The 1.8m square horizontal slab is lifted up on some stones forming a small chamber below. Standing at the eastern end is a 2.2m tall stone that is 1.3m wide and has a beautifully rounded top, like a door with a semicircle stuck on the top.
This is a total mystery site and quite wonderfull because of it. I love the amazing orange lichen that covers the one face of the upright stone.
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.