A cropmark, roughly seven metres in diameter, traces the outline of what appears to be a conjoined ditch-barrow, a type of prehistoric burial monument defined by a circular enclosing ditch rather than a raised mound. From ground level, there is nothing obvious to see. From above, the grass tells a different story.

Cropmarks appear when buried features, such as ditches or walls, affect the growth of vegetation overhead. A filled-in ditch retains more moisture than the surrounding soil, encouraging lusher, sometimes darker growth above it, while a buried foundation does the opposite. In this case, the faint ring preserved beneath the turf at Lissard suggests the remains of a ditch-barrow, a funerary monument associated broadly with prehistoric activity in Ireland, though the precise date of this example is not established. The term "conjoined" indicates the possibility that two such circular features share a portion of their circumference, a configuration seen elsewhere in the Irish landscape. The site was identified by Caimin O'Brien from a Google Earth orthophoto taken on 18 November 2018 and uploaded to record in December 2021, making it a relatively recent addition to the archaeological catalogue.

Because the feature is visible only as a cropmark, a visitor standing in the field would be unlikely to notice anything at all. The grassland here has been reclaimed, meaning the surface has been levelled and improved for agricultural use over time, further obscuring any subtle undulation that might once have hinted at what lies beneath. The best way to appreciate the site is through the aerial imagery in which it was first recognised. For those with an interest in remote-sensing archaeology, the orthophoto offers a quiet demonstration of how much the Irish landscape continues to conceal, and how seasonal conditions and the angle of satellite capture can suddenly bring a buried monument into view after centuries of invisibility.