The only evidence for its existence is a circular feature caught in an aerial photograph, appearing on the northern side of an east-west field boundary. At ground level, there is nothing to indicate it at all.

Enclosures of this kind, when they do exist, are typically the remains of early medieval farmsteads, the circular banks and ditches that once defined a domestic or agricultural space in the Irish landscape. Thousands have been recorded across the country, many surviving as low earthworks, others detectable only from the air, where cropmarks or soil discolouration reveal shapes that centuries of farming have otherwise erased. At Castlefarm, what the aerial photograph shows is described only as a possible enclosure, a circular feature whose origin and date remain unconfirmed. The photograph reference is GSIAP Q 203, part of the Geological Survey of Ireland aerial photographic collection, and the site was recorded as part of the Castleisland District Archaeological Survey.

There is, in practical terms, nothing to visit here. The site sits in ordinary farmland, indistinguishable from the fields around it, and the feature that prompted its recording exists only as a mark on a photograph taken from altitude. That is itself a curious thing to sit with: a place that qualifies as an archaeological site largely because of what cannot be seen from the ground.