It is less than a metre tall, barely a metre wide, and its purpose remains genuinely uncertain. It may be part of a souterrain, an underground or semi-underground passage typically associated with early medieval ringforts, used variously for storage, refuge, or ventilation. Or it may be something else entirely. The ambiguity is part of what makes it worth attention.

The chamber belongs to a circular univallate rath, meaning a ringfort enclosed by a single bank and ditch, positioned to command a wide view over the valley of the Finglas river and the entrance to Tralee Bay beyond. The small drystone-lined space is cut into the outer face of that bank, open to the east, measuring 1.7 metres north to south, 0.7 metres east to west, and standing just 0.75 metres high. Directly inside the bank at the same point, there is an oval hollow roughly 6.5 metres by 3.5 metres and up to 0.8 metres deep. Whether the hollow and the chamber are related, and what the two features together might once have formed, is not resolved. The site was documented by J. Cuppage in the 1986 Corca Dhuibhne archaeological survey of the Dingle Peninsula, a region whose density of prehistoric and early medieval monuments is remarkable even by Irish standards.