The stone at Cullaun is one of 48 recorded in that townland alone, part of a broader concentration that spills across the adjoining townland of Timoney Hills, where a further 173 were counted. One obvious stone circle stands out among the Cullaun examples, but the rest offer no such geometry, no alignment, no apparent system at all.

When the Inspector of National Monuments surveyed the area in 1934 to 1936, he recorded 221 stones still standing or lying prostrate across the two townlands, and described them as "a most remarkable group." All are of red sandstone or conglomerate, standing between roughly 0.9 and 1.8 metres above ground. The Cullaun stone catalogued here measures 1.5 metres high, with a subrectangular cross-section, and is orientated on a NNE-SSW axis. Notably, there are no packing stones visible around its base, which is the kind of detail that matters when trying to establish whether a standing stone is genuinely ancient or more recently placed. A later survey published by Stout in 1984 mapped 245 stones in total across the area, noting that 70 had already been removed and that five associated cairns, small mounded stone monuments, had also disappeared. That the entire concentration sits within the Parker-Hutchinson estate of Timoney Park has led some researchers to question whether the stones are prehistoric at all, or whether they might have been arranged, moved, or supplemented during the landscaping of a private demesne. That question remains unresolved, which gives the site a peculiar ambiguity: monumental in scale, uncertain in origin.