That, in a quiet way, is precisely what makes it interesting. In a wet, marshy meadow on a slight north-facing slope in a Tipperary river valley, a possible circular earthwork sits completely invisible at ground level, betraying no ridge, no hollow, no trace of itself to anyone walking across it. The only reason it is known to exist at all is that an aerial photograph, OS AP 9723, caught what appears to be a cropmark, the faint differential growth in vegetation that can reveal buried or long-levelled structures from the air, outlining a roughly circular enclosure approximately 21 metres in diameter.

Circular earthwork enclosures of this kind are a familiar presence in the Irish landscape, ranging from the ring-forts of early medieval settlement to much earlier prehistoric boundaries, and their identification from aerial photography alone, without excavation, means their age and precise function usually remain open questions. What can be said here is that the surrounding landscape does the quiet work of suggestion: a river running around 100 metres to the north, low-lying ground prone to waterlogging, and a place-name, Giantsgrave, that carries its own weight of folk memory and older association. Whether the name has any connection to the buried feature is not recorded, but in Ireland such townland names frequently attach themselves to ground that once held something conspicuous, something that later generations could only half-explain.