It appears on the archaeological record not because of any dramatic discovery, but because a local man, encountered by chance during a site inspection in November 1982, pointed out the ground beneath which he had once found what he described as an underground cave. No hollow, depression, or disturbed earth marks the spot today.

Souterrains are stone-lined underground passages or chambers, typically built during the early medieval period in Ireland, often associated with nearby settlement sites. They are thought to have served as places of refuge, cool storage for foodstuffs, or a combination of both. The man who pointed out this site believed it resembled other souterrains he knew of in the surrounding area, which suggests the local landscape may once have held a cluster of such structures, even if most have left no surface trace. The Moneen example was never formally recorded through excavation, and what was found, or how fully it was explored, remains unclear. The record rests entirely on a single verbal account given to surveyors on a November afternoon more than four decades ago.

There is nothing to see at the site now. No visible surface trace survives, and the land is working pasture. The interest lies less in visiting than in what the account suggests: that local knowledge, passed informally and almost incidentally, sometimes preserves the only evidence that something underground exists at all.