It no longer does. What makes this site unusual is precisely its absence: land reclamation works carried out in the late 1980s destroyed the structure entirely, and today there is no visible trace of it at ground level. The coordinates mark a place where something ancient used to be.

Megalithic tombs in Ireland range across several types, including court tombs, portal tombs, and passage tombs, most of them dating to the Neolithic period, roughly 4000 to 2500 BC. The Grallagh example was unclassified, meaning it could not be firmly assigned to any of these categories, possibly because it was already disturbed or only partially recorded before its destruction. Land reclamation, the process of draining and levelling boggy or marginal ground to make it agriculturally viable, accelerated considerably in Ireland during the latter decades of the twentieth century, and it claimed a significant number of archaeological sites before systematic protections were widely enforced. This tomb is one of them.