A circular enclosure roughly 35 metres in diameter lies buried beneath pasture, invisible at eye level but unmistakable from above, where the differential growth of grass over ancient buried features betrays the outline of something old and deliberate beneath the soil. These so-called cropmarks form when buried ditches or banks affect how deeply roots can reach, causing the vegetation above them to grow at a slightly different rate or colour to the surrounding field, particularly in dry summers when the contrast sharpens.

The enclosure sits immediately to the south of an already-recorded ringfort, with Tullig House lying around 115 metres to the north, suggesting this small area of farmland has been a focus of human activity across very different periods. Ringforts, which are circular enclosed settlements typically dating from the early medieval period, roughly 500 to 1000 AD, are among the most common archaeological monument types in Ireland, but the enclosure to their south is a separate and less easily categorised feature. Its relationship to the ringfort is not fully understood. The cropmark was visible on black and white aerial photographs taken by the Ordnance Survey of Ireland in 1995, and remained detectable on Google Earth imagery captured in March 2015, as well as on more recent Digital Globe aerial photography.