From the road you can see a large lump of bedrock in the field and I thought at first that this is where the bullaun must be. However, whilst crossing to this lump of rock the real thing caught my eye. An earthfast boulder, flush with the field surface had a round patch of grass in its centre.
I quickly pulled at this turf and the massive bullaun cup was revealed. It measured 30cm across and I didn't reach the bottom! This is a very primal feeling bullaun with a feeling of extreme age to it.
From Carlow take the N80 south. After roughly 8km you will reach the 4th set of crossroads. Continue until you pass the next right hand turn. Just past this junction you should see some fairly new houses. Opposite these is a gate into the field. From the gate you can see a rock outcrop to the left 100m or so into the field. If you walk towards this you will pass right by the bullaun, but it is a tricky one to spot.
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.