Enclosed within a hedged area, it consists of a façade of three irregular granite boulders, behind which a larger boulder has been set with a arrangement of smaller stones forming what appears to be a seat. To the west, two substantial granite slabs have been positioned upright on their long axis. The whole thing carries the atmosphere of antiquity, yet the tool marks visible on the stone introduce a complicating note.

The ambiguity is the point. Archaeologists Geraldine Stout and Padraig Clancy, who compiled the survey record for this site, describe it as appearing to be a folly, that category of ornamental structure built to evoke ruins or ancient grandeur rather than to serve any practical function. Follies were fashionable among wealthy landowners from the eighteenth century onwards, and granite was the local material of choice on this stretch of the Dublin and Wicklow coastline. Yet Stout and Clancy leave the question open: the structure may incorporate the remnants of an earlier, genuine monument. The name Druid Hill does not help resolve things, since such names in Ireland were often applied retrospectively by antiquarian-minded Georgians who liked to associate dramatic landscapes with ancient ritual, whether or not any actual evidence supported the connection. The tool marks, though, suggest human intervention at some point, and the arrangement of the stones is deliberate enough to raise the question of what came before any possible nineteenth-century embellishment.

The site sits within its hedged enclosure on the hill summit, which means the structure itself is set apart from the surrounding parkland rather than immediately visible on approach. Killiney Hill is a public park, easily reached on foot from Killiney or Dalkey, and the summit path passes through an area well known for its views over the bay. The enclosed area containing the structure is on the eastern side of the hilltop. It is worth going slowly once inside the enclosure, since the details, the façade arrangement, the seated boulder, the flanking slabs, only become legible once you are close to the stones and can read how they relate to one another.