The site at Lissobihane is a ditch barrow, a type of funerary monument in which the burial or ceremonial focus is defined not by a mound of earth but by a surrounding fosse, which is simply a shallow ditched enclosure. From ground level, in rough pasture that remains wet and badly poached by cattle despite drainage efforts, there is little to catch the eye. From above, the sub-circular form becomes legible.

Aerial photographs revealed the site as a ring-ditch, the fosse tracing an arc from the east-south-east, around the south, and up to the north-north-east, enclosing an area measuring roughly 5.6 metres north to south and 4.5 metres east to west. The ditch itself is about 1.5 metres wide and only some 7 centimetres deep at the time of survey, much of its original profile likely lost to centuries of agricultural activity. That activity has left its marks in other ways too: one drainage channel cuts directly across the monument through its north-east sector, and a second runs just south of the fosse. A closely related ring-barrow lies approximately 8 metres to the east, suggesting this corner of Lissobihane once held more significance than its present condition implies. The pairing of monuments of this kind is not unusual in the Irish prehistoric landscape, where burial and ceremonial sites were sometimes established in loose clusters rather than in isolation.