At the foot of the north-north-westward-facing slope of Knockafutera, in the Ballyhoura Mountain range of north Cork, a double-banked ringfort survives in broadly recognisable form, despite generations of agricultural use that have left their mark in cattle gaps, disturbed boundaries, and levelled stretches of earthwork.

A rath, to use the Irish term, is an enclosed farmstead of the early medieval period, typically dating from somewhere between the fifth and twelfth centuries. Most consisted of a roughly circular area of raised ground, protected by one or more earthen banks with an accompanying fosse, the term for the ditch from which the bank material was originally dug. The Sorrel example follows that pattern closely: a slightly raised interior measuring roughly 34 metres east to west and just over 29 metres north to south, enclosed by two concentric earthen banks separated by an intervening fosse about 2.7 metres wide. The inner bank still stands to a height of just over a metre on its outer face, while the outer bank reaches 1.2 metres where it remains intact. A shallow outer fosse survives to the south-east. The site sits on a break in slope, a positioning common to raths across Ireland, where the natural gradient offered both drainage advantages and a modest degree of elevation.

The enclosure has not escaped the pressures of working farmland. The outer bank has been levelled to the north-east, the intervening fosse is disturbed where a field boundary crosses it, and the western stretch of that fosse has become waterlogged. Cattle have worn gaps through the banks in several places. The mature trees planted along the inner bank are a reminder of a once widespread rural custom of leaving such earthworks alone, whether out of superstition, practicality, or both, even as the land around them was worked and reshaped across the centuries.