It is not a house, not a church, not a souterrain. It is a triangular hut, which is already unusual; most early Irish dry-stone buildings are rectangular or circular, and a three-sided plan is rare enough to raise questions that the archaeology alone cannot yet answer.

What survives are the foundations, with walls averaging around 4.3 metres long and 1.5 metres wide, corbelling slightly inward, a technique in which each successive course of stone projects a little further than the one below, gradually closing the roof without the need for timber or mortar. The collapse of the structure has filled much of the interior, so the full arrangement of the floor space remains unclear. Its position close to the summit of Knocknadobar, on Killurly Commons on the Iveragh Peninsula, means it would have looked out across a broad sweep of landscape from the south-east to the north, an orientation that could suggest a practical function, a lookout or a seasonal shelter, though nothing in what survives confirms this with any certainty. The site was recorded and described by archaeologists A. O'Sullivan and J. Sheehan in their 1996 survey of the Iveragh Peninsula published by Cork University Press, and it remains one of the quieter puzzles that Kerry's uplands tend to produce without much fanfare.