Over two hundred stones, cut from red sandstone and conglomerate, rise between roughly one and two metres from the ground across the townlands of Timoney Hills and Cullaun. They appear to follow no obvious arrangement or ceremonial geometry, with the single exception of one stone circle identified in Cullaun. That absence of pattern is itself unusual; most megalithic groupings of this scale show at least some evidence of deliberate alignment or enclosure.

When the Inspector of National Monuments surveyed the site in 1934 to 1936, he counted 221 stones still standing or in situ, describing them as "a most remarkable group." A subsequent map produced for the Archaeological Survey of Ikerrin, published by Stout in 1984, recorded 245 stones in total, of which 70 had already been removed, along with five cairns, a type of prehistoric stone mound, all of which had also disappeared by that point. The steady attrition of the monument is troubling enough, but there is a more fundamental uncertainty hanging over the whole site. The stones sit within the landscaped estate of Timoney Park, formerly the Parker-Hutchinson estate, and their location within a designed demesne landscape has led some researchers to question whether they are genuinely ancient monuments at all, or whether they may have been arranged, augmented, or even fabricated as estate ornaments during the eighteenth or nineteenth century, when landowners across Ireland and Britain sometimes scattered standing stones and other antiquarian features across their grounds as aesthetic flourishes. The stone recorded as 5W on the 1934 to 1936 survey map has since vanished entirely, with no surface trace remaining where it once stood.