A souterrain is an underground stone-lined passage or chamber, typically associated with early medieval ringforts, and used for storage, refuge, or both. What makes this one quietly compelling is that the ringfort it once belonged to has itself been levelled, leaving two erasures stacked on top of one another: a vanished enclosure and its buried interior feature, now readable only as a slight undulation in the grass.

The site sits on the footprint of a rath, the recorded reference for which is LI013-109. A rath is a circular earthen enclosure, common across Ireland from the early medieval period, typically enclosing a homestead and its associated structures. That enclosure has been largely flattened, but its memory persists in an east-west orientated bank stretching approximately 76.9 metres across the field toward an area of marsh. The bank is modest, just about a metre wide and no more than twenty centimetres high in places, but at its western end, on what was once the interior of the rath, a rectangular concentration of stones becomes visible. This stony spread is roughly eleven metres long and about a metre wide, with kerbing surviving along its southern edge, suggesting the remains of the souterrain's roof collapse or structural lining. The eastern end of this feature terminates at a single boulder, now sitting in a patch of scrub.

The field is working pasture, so access would depend on the landowner's permission. The features are easiest to read on the ground in low winter light or after a period of dry weather, when slight changes in ground level become more legible. The bank itself is the most reliable thing to follow, beginning near the western concentration of stones and running toward the marshy ground to the east. The kerbing along the southern edge of the stone spread is worth looking for closely; it is subtle, but it is the clearest surviving indication that what lies here was once a deliberate and carefully constructed underground space rather than simply field clearance.