Info courtesy of English Heritage, via magicmap:
“The remains of a long cairn of Neolithic date situated on the south west slope of Castle Hill commanding extensive views southwards.
The long cairn, orientated NNE to SSW, measures a maximum of 60m long and 14m wide and stands to a maximum height of 2m. It has been constructed of rounded boulders and some stone slabs with smaller stones around the edge.”
