A souterrain, to use the technical term, is a man-made underground structure, typically of early medieval Irish origin, built from stone and used variously for storage, refuge, or purposes that archaeologists still debate. What makes this particular site quietly puzzling is that there may be more than one of them, and the relationship between the two has never been resolved.

The first hint came in the 1920s, when a heap of stones was removed and workers exposed a circular stone structure roughly three metres in diameter. Leading away from it was an underground passage, about ninety centimetres wide and equally deep, and inside that passage lay a small holed stone, a find noted by O'Sullivan in 1931. More intriguing still, a larger souterrain had already been discovered some years earlier, described as lying on the other side of a fence but on the same farm. Whether these two underground features were entirely separate constructions or formed different chambers of one extended system was never established. Adding another layer to the uncertainty, the ringfort with which the souterrain was probably associated, a circular enclosure of the kind that would typically have sheltered an early Irish farmstead and its outbuildings, was itself destroyed sometime in the late twentieth century, removing what might have been the most obvious architectural clue to how the underground passages related to the wider site.

The destruction of the ringfort means that whatever surface context once existed around the souterrain is now gone. The passages themselves, if they survive at all, lie beneath a working farm, and their precise location, extent, and condition remain uncertain. The holed stone recovered in the 1920s is the only artefact on record from the site, modest enough as a find, but suggestive of activity that once gave this unremarkable patch of Kerry ground a particular significance to the people who dug into it.