A pond barrow is a prehistoric funerary or ceremonial earthwork in which a central hollow or depression is surrounded by a bank, essentially the reverse of the more familiar burial mound. Where a round barrow rises from the ground, a pond barrow sinks into it, its shallow basin ringed by an earthen rim. The result is something that can read as a natural feature, a dried-up pool or a quirk of the landscape, unless you know to look for the deliberate geometry of the surrounding bank.

Pond barrows are rare in an Irish context, more commonly associated with the dense ceremonial landscapes of Wessex in southern England, where they cluster around major Bronze Age complexes. Their presence in Connacht is therefore noteworthy. Grange in Sligo is already a townland with deep prehistoric associations, lying close to Lough Arrow, a region that preserves a remarkable concentration of Neolithic and Bronze Age remains. The precise dating and excavation history of this particular monument are not currently documented in publicly available records, so the details of its construction and use remain uncertain. What is clear is its classification as a pond barrow, a designation that places it within a specific and unusual category of prehistoric earthwork, one that continues to prompt debate among archaeologists about its ritual function.