I'm breaking one of my rules here and adding a site I didn't actually find ... but I did get very close! While asking for directions a local man told me that as a kid he used to play in the woods around the tomb, but since then trees have fallen, light has got in and the floor of the woods is now thick with head-high bracken and brambles. If you come looking for this one bring a machette!
It is supposed to be a good example. All the stones are present, but the capstone has slipped from the top and pushed in one of the portal stones . I'll probably come beck myself one day, fully armed, and find it.
The large rock used to form the roof of a portal tomb or kist.
Portal stones are a pair of upright stones that form the 'entrance' to a portal tomb. They are usually well matched, being of even dimensions. As well as forming this doorway they also act as the front support for the capstone and are usually taller than the stones that form the chamber.
Often there is a door stone in between them blocking off access to the chamber within.
Click Thumbnail to View Full Size Image
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.