The site at Foyle South once featured an almost perfectly square enclosure, measuring approximately 42 metres on each side, surrounded by a water-filled moat that was six metres wide and a metre deep. Though the area tends to be poorly drained, its elevated position offered strategic views to the northeast, making it an ideal location for a defensive settlement during medieval times.

Archaeological surveys from the 1970s described the site as having a flat platform with traces of both internal and external banks, typical features of these fortified homesteads that dotted the Irish landscape during the Anglo-Norman period. These moated sites served as both defensive structures and status symbols for wealthy landowners, with the water-filled ditches providing protection whilst also demonstrating the resources needed to maintain such elaborate earthworks.

Unfortunately, the site met a rather unceremonious end sometime between the 1970s and 1987 when it was levelled, leaving no visible traces at ground level today. Satellite imagery from 2018 shows the monument area surrounded by commercial forestry, with the historic site itself left as fallow ground; a small, empty patch amongst the trees where centuries of history once stood. While the physical remains have vanished, the site remains recorded and protected as an archaeological monument, preserving at least the memory of this once-imposing medieval stronghold.