Aerial imagery from 2019 shows a levelled field, but a subtle shift in vegetation colour marks the footprint of what was once a substantial earthwork, the land quietly betraying what lies beneath even when the surface gives nothing away.

Ordnance Survey maps from 1838 and again from 1933 recorded a subcircular terraced mound measuring roughly 45 metres north to south and 38 metres east to west. Local memory held that it had three rings, which suggests it may have been a multivallate earthwork, a monument defined by concentric banks and ditches. Such earthworks appear throughout Ireland in various forms, from hillforts to ringforts, and their terraced profiles often indicate significant effort in construction and, by implication, significance in use. Whatever Doon Hill once was, it was no small feature. Then, in the early 1980s, it was extensively quarried out. When an inspection was carried out in April 1985, banks and mounds were still visible, but it was impossible to say whether any of these remnants belonged to the original monument or were simply the debris thrown up by the quarrying itself. That ambiguity, the inability to distinguish ancient earthwork from modern spoil, is its own kind of loss. By 2019 even those traces had been levelled, leaving only the grass to hint at the outline of something that two generations of maps had thought worth recording.