This roughly circular sunken structure, measuring about 2.75 metres across, was carefully built into the rising ground with earthen banks reinforced by stone facing on the interior. A narrow opening, just half a metre wide, faces west towards a stream that runs immediately below. The structure’s deliberate positioning; built into the slope with its entrance oriented towards running water; suggests it may have served as a sweathouse, a type of traditional Irish sauna used for medicinal and social purposes well into the 19th century.

Alternatively, this sunken feature could represent the remains of a kiln, though none appears on any edition of the Ordnance Survey maps for this location. Interestingly, a lime kiln is marked on the 25-inch Ordnance Survey map in the field just west of the stream, indicating some industrial activity in the immediate area. The presence of two similar structures just 90 metres downslope to the south strengthens the case for these being purpose-built installations rather than natural features or simple storage pits.

The site sits within a landscape rich with archaeological remains; a ringfort lies just 40 metres to the northeast, placing this mysterious structure within a broader pattern of human settlement and activity. Whether it served as a sweathouse for healing and cleansing rituals or as a kiln for processing materials, this modest but carefully constructed feature offers a tangible connection to the everyday lives and practices of those who once lived and worked in this upland valley.