The souterrain at Templenacarriga in County Cork offers none of that. There is no visible surface trace whatsoever, nothing to catch the eye or mark the ground, just land that gives no outward sign of what may lie beneath it. A souterrain is an underground stone-lined passage or chamber, typically associated with early medieval settlement in Ireland, and often interpreted as a place of refuge, storage, or concealment. That Templenacarriga has one, or had one recorded as such, is known largely because the ground above it was once part of something more conspicuous.

The connection was noted by Power in 1917, who described souterrains in relation to what he called a very fine circular lios at this location. A lios, sometimes anglicised as rath or ringfort, is a circular enclosure defined by an earthen bank and ditch, one of the most common monument types in the Irish landscape and typically associated with farming settlements of the early medieval period. The combination of a lios and an associated souterrain is a well-attested pattern across Ireland, the underground feature often opening from within the enclosed area. At Templenacarriga, the ringfort itself is recorded separately, and Power's account links the two. Beyond that pairing, however, the documentary record is thin, and the underground passage, if it survives at all, is entirely invisible from the surface.