What survives at Rush is a passage tomb, the kind of megalithic monument built during the Neolithic period from roughly large upright stones capped with a roof slab and sealed within a cairn of smaller stones, and within and around that cairn, a cluster of cist burials that belong to a later era entirely. A cist is a small stone-lined box grave, typically associated with the Early Bronze Age, and finding them inserted into or placed alongside an older monument suggests that communities returned to these ancestral places long after their original purpose had faded, still treating them as somewhere significant.

Three cist burials were recorded here in total. Two were found within the cairn of the passage tomb itself, and a third was positioned to the west of the kerbstones, the ring of upright stones that would originally have defined the monument's outer edge. The earliest scholarly notice of the site appears in a publication by Newenham in 1838, with further documentation by Ó Ríordáin in 1968. The contents of these graves are telling in their variety. The cist at the northern end of the cairn held skeletal remains alongside a food vessel, a type of decorated ceramic pot commonly placed with the dead during the Early Bronze Age, perhaps containing provisions for the afterlife or simply marking the burial as significant. The cist to the east contained a food vessel too, but this time accompanied by a cremation rather than an intact skeleton. Most curious of all is the third cist, the one set outside the kerbstones entirely, which held only a human skull. Whether that represents a partial burial, a deliberate deposit, or something else is not recorded. The site is catalogued as DU008-013001-, and the burial evidence has been discussed by Cahill and Sikora in a 2011 publication.

Rush is a coastal town on the Fingal peninsula, and the area is known to have a concentration of prehistoric monuments, though many are not prominently signposted or immediately obvious on the ground. Anyone visiting should check current access arrangements in advance, as sites of this kind are frequently on or near private land. The physical remains may be modest to the untrained eye, a low mound, some stones, a scatter of kerbstones, but knowing what lies within changes the scale of what you are looking at: a Neolithic tomb reused across generations, its cairn absorbing the dead of a community that came after and found, in this older structure, a place still worth returning to.