Today, there is nothing to see. The structure has vanished so completely that it leaves no surface trace at all, absorbed back into the landscape of rock, tree, and fast-moving water that presumably gave it purpose in the first place.

By 1842, when the Ordnance Survey produced its first large-scale six-inch maps of Ireland, Poulawillin Mill was already recorded as a ruin, suggesting it had gone out of use and been abandoned some time before that. The river itself has since shifted. The 1842 map shows what appears to have been the main channel running to the west of its current course, feeding back into the present channel just below the waterfall through a deeply incised outlet. By the time the twenty-five-inch Ordnance Survey maps were produced between 1888 and 1913, the river had migrated to where it flows today. The mill sat in the angle of that older meander, likely drawing on its flow. The waterfall beside it is formed entirely by the natural action of the river on the local limestone, carving flat-faced abutments on one bank and a craggy overhang on the other. Whatever structural stonework the mill once contained has almost certainly been robbed out over the generations, a common fate for abandoned rural buildings whose dressed stone was too useful to leave in place, and any timber elements will long since have perished. What remains is the geology: the rock-face, the plunge pool, a fallen tree spanning the channel, and the quiet evidence of a watercourse that has quietly rearranged itself over the course of two centuries.