Rather than seek flat ground, whoever constructed it chose a steep north-facing slope in what is now pasture at Doireach in West Cork, then carefully raised the interior on the downhill side to create a level living surface. That kind of deliberate earthworking, done without machinery, speaks to how seriously the builders took the site's location, whatever their reasons for choosing it.

The monument is a rath, the Irish term for a ringfort, a form of enclosed farmstead common across Ireland from roughly the fifth to the twelfth centuries. Most were the homesteads of farming families, defined by a circular bank and an outer ditch, known as a fosse, that separated the domestic interior from the surrounding landscape. At Doireach, the enclosure measures approximately 41 metres north to south and 40 metres east to west. The earthen bank survives to an internal height of 0.8 metres, with an external fosse still traceable to a depth of around 0.4 metres. On the north side, there is a gap in the bank about seven metres wide, which may preserve the line of the original entrance, possibly crossed by a causeway over the fosse. It is a modest but coherent survival, and the engineering choice to compensate for the hillslope by building up the northern interior gives the site a specificity that many smoother examples lack.