The site is a souterrain, an underground stone-lined tunnel or chamber typically built during the early medieval period and associated with nearby ringforts, where they served variously as storage spaces, refuges, or escape routes. What makes this particular example quietly compelling is not what it contains but what it lacks: there is no visible surface trace whatsoever. The ground gives nothing away.

The only record of the feature comes from a 1937 note by Broker, who described it simply as a passage to Michael Corkery's fort. That phrasing, incidental and almost conversational, suggests the souterrain was at least partially known or accessible at the time, associated with a ringfort on the same land. Ringforts, the circular enclosed settlements that pepper the Irish countryside by the tens of thousands, date predominantly from the early medieval period, roughly 500 to 1000 AD, and souterrains are among their most archaeologically interesting features. The Liscahane example sits within one such enclosure, though by the time it was formally recorded, whatever opening or indication once marked its presence had already vanished from sight.