Not a ruin, not a tumbled wall, not so much as a grassy bank; whatever once defined this site has vanished entirely below the surface of the ground, leaving a low rise in an undulating landscape as its only physical trace. That invisibility is itself a kind of puzzle, since enclosures of this type, typically circular or oval earthworks used in early medieval Ireland to define a farmstead or settlement, usually leave at least some impression on the terrain.

What makes the location more intriguing is its immediate neighbourhood. To the north lies a second enclosure site, and to the south a tower house, the kind of fortified stone residence common across Ireland from the late medieval period, roughly the fourteenth to the seventeenth centuries. Together, the three sites suggest a landscape that was repeatedly chosen and reused across different periods, with the Knockagh enclosure sitting quietly between its more legible companions. The site and its neighbours are recorded in the Archaeological Inventory of County Tipperary, compiled by Jean Farrelly and Caimin O'Brien and published in 2002.