What makes this particular patch of countryside worth pausing over is not any single dramatic feature but the quiet accumulation of time written into its boundaries: this is a multiperiod field system, meaning its walls and divisions were not laid down in one era but built up, modified, and reused across several distinct periods of occupation and farming.

The field system does not stand alone. It sits in deliberate relationship with four cashels and three enclosures scattered around its perimeter. A cashel is a stone-walled circular or oval enclosure, most commonly associated with early medieval settlement in Ireland, used to define a farmstead and protect livestock. The enclosures in question here may belong to different periods again. Together, these seven features frame the field complex, suggesting that whoever farmed and lived at Poulbaun over the centuries oriented their agricultural boundaries around existing structures, or that the structures and fields grew up together in a long, layered conversation between people and land. The system was already partially visible on the Ordnance Survey six-inch map edition of 1915, which means at least some of its boundaries were legible in the landscape over a century ago, even as surrounding land was being progressively cleared and modernised.