Most ringforts, known in Irish as raths, are simply a roughly circular living area enclosed by one or more earthen banks, the kind of farmstead that dotted the Irish countryside throughout the early medieval period. This one, however, contains something additional: a semi-circular raised mound in its south-western interior, curving inward toward the enclosing bank in a way that sets it apart from a straightforward domestic enclosure.

The site carries the Irish name Lios na Darach, meaning the ringfort of the oak, anglicised to Lissadrough. It is classified as a univallate rath, meaning it has a single enclosing bank rather than the multiple concentric rings found at higher-status sites. What distinguishes it is that interior mound, a slightly raised, semi-circular feature pressing against the inside of the bank at the south-western sector. Its precise original function is not recorded. It may have served as a platform, a store, or a feature with a more ceremonial purpose, though none of that can be said with certainty from what survives. C. Toal's North Kerry Archaeological Survey, published in 1995, recorded both the enclosure and the anomalous mound, noting its curved alignment toward the interior of the bank as a feature worth marking separately in the record.