This is a rath, the Irish term for a ringfort, the most common archaeological monument type in Ireland. These were enclosed farmsteads, built mostly during the early medieval period, where a family would have lived within a defended circular area, the banks and ditches serving as a boundary against livestock theft and providing a degree of social status as much as physical protection.

The Fiddane example is modest in scale, measuring twenty-four metres across on its east-west axis, and is enclosed by two earth and stone banks with a fosse, or ditch, running between them. The fosse here is between two and a half and four metres wide and survives to a depth of around one and a half metres. A gap of roughly two metres on the western side likely marks an original entrance. The inner bank is the better preserved of the two, standing to an external height of about one point three metres, while the outer bank has suffered considerably, sliced through where a road was laid from the east to the south. Inside the enclosure, a hollow depression in the north-western sector is not ancient in origin; it is the result of quarrying, which has disturbed whatever might once have occupied that part of the interior.