Known as Cloghaunglass, or Clochán Glas in Irish, it is a corbelled drystone hut, meaning its roof was formed not by timber or mortar but by carefully overlapping horizontal courses of stone, each projecting slightly inward until the courses met at the top. This technique, used across the Dingle Peninsula for centuries, requires no binding material at all; the weight of the stones holds everything in place. What makes this particular example quietly puzzling is that at some later point, someone divided the interior with a wall, bisecting the original circular space. Whether this was done to create two functional areas, to shore up a weakening structure, or for some other purpose entirely, the stones are not saying.

The hut is modest in its dimensions: roughly 5.5 metres in diameter, standing 1.75 metres high, with walls approximately 1.6 metres thick. Those wall measurements are worth pausing on. In a structure of this diameter, walls that thick account for a significant portion of the overall footprint, suggesting a building designed to endure rather than simply to shelter. The site was recorded and described by J. Cuppage in the 1986 Dingle Peninsula archaeological survey, a substantial catalogue of the extraordinary concentration of early monuments found across Corca Dhuibhne, the southwestern Kerry peninsula that takes in Brandon Mountain and its surrounds. The Irish name Clochán Glas refers to the type of structure, a clochán being precisely this kind of corbelled stone cell, associated across western Ireland with early medieval monastic and hermitic settlement, though not exclusively so.