Drystone construction means exactly what it sounds like: stones laid without mortar, relying entirely on careful placement and weight to hold their form. Over centuries, such structures can quietly collapse back into the landscape, becoming almost indistinguishable from natural scatter, and this one is well along that path.

Documented by Judith Cuppage in 1986, the structure measured approximately five metres in diameter and still stood to a height of around 1.1 metres at the time of recording, though even then it was described as very poorly preserved. Hut sites of this type are found across the Dingle Peninsula and broader Kerry uplands, and while it is not always possible to date them precisely without excavation, they are generally associated with early medieval or prehistoric settlement and land use, when communities grazed animals on higher ground and built simple shelters accordingly. Gleann Fán sits within a landscape exceptionally dense with such remains, and this particular structure is one small, battered piece of a much larger pattern of early occupation on and around Mount Eagle.