The word "may" is doing real work here. The site is known locally as a "fort", and the evidence for what lies beneath it amounts to a handful of small openings in the ground, the largest of which is just half a metre wide and twenty centimetres tall, none of them accessible.

Souterrains were built throughout Ireland during the early medieval period, often in association with ringforts, and they could run for considerable distances underground, sometimes incorporating chambers and deliberate crawl-points designed to slow down an intruder. The Iveragh Peninsula has a notable concentration of such sites, documented by archaeologists A. O'Sullivan and J. Sheehan in their 1996 survey of South Kerry. At Glancuttaun, the surviving surface features are slight: those tight, inaccessible gaps in the earth that hint at a void beneath without confirming its extent, its construction, or its condition. Whether the passage is intact, collapsed, or something in between remains unknown.

What lingers about this site is precisely its indeterminacy. The local memory of a "fort" preserves something real, a sense that the place was once significant, even if the physical evidence has shrunk to a few dark slits in the ground. The souterrain, if it is one, keeps its own counsel.