The site exists as a cropmark, a phenomenon where buried features influence how vegetation grows above them, causing subtle differences in colour and height that become legible when viewed from altitude, particularly during dry summer conditions when crops are under stress. What emerged from a satellite image captured on 28 June 2018 is a sub-circular form measuring roughly 22 metres north to south and 16 metres east to west, its shape pressed into the landscape like a faint impression in soft material.

The enclosure was identified by Simon Dowling using Google Earth Pro, working from Digital Globe imagery dated to that same summer day in 2018. Sub-circular enclosures of this kind are a recurring feature of the Irish landscape and are generally associated with early medieval settlement, the period roughly spanning the fifth to twelfth centuries, when ringforts served as farmsteads and enclosed domestic activity behind earthen banks or ditches. At 22 metres across, this example sits at the smaller end of that spectrum, though its proportions are not unusual. What gives the Oldtown site additional context is a larger, irregular enclosure recorded approximately 180 metres to the south-west. The proximity of two enclosures, different in form and size, hints at a more complex pattern of activity in this part of the Kilkenny landscape than either feature alone would suggest.