The Ordnance Survey's second edition mapped it as a circular sheep-fold, which tells its own small story about how the Victorian cartographers read the countryside. What they recorded as a fold is now understood to be a hut site, a category of structure associated with early settlement and seasonal occupation across the Dingle Peninsula. The distinction matters because it shifts the feature from the merely agricultural into something considerably older and less easy to categorise.

What survives today is modest but precise: an oval mound of collapsed stone measuring 3.6 by 2.9 metres and standing roughly 0.75 metres high. A single upright slab remains in place on the southern side of what was once an east-facing entrance. That one stone, still standing while the rest has subsided into rubble, is the site's most legible detail. The structure was documented by J. Cuppage in the 1986 Corca Dhuibhne archaeological survey of the Dingle Peninsula, a project that worked through the extraordinary concentration of early remains in this part of west Kerry, where the landscape holds layer upon layer of occupation going back thousands of years. Gleann Fán sits within that wider context, a valley where a collapsed oval of stone carries more history than its dimensions might suggest.