The ringfort at Aghavoghil in County Leitrim is notable partly for the opposite reason: the majority of it is gone. Tucked into a coniferous plantation on a steep north-facing slope of the Dartry mountains, what remains is essentially one wall of a room whose other three sides have been quarried away, leaving a single earthen bank to mark where a complete enclosure once stood.

Ringforts, known variously as raths or cashels depending on their construction, were the most common form of enclosed farmstead in early medieval Ireland, typically consisting of a circular bank and ditch surrounding a domestic space. The Aghavoghil example, had it survived intact, would have measured roughly 35 metres in diameter, a figure recorded on the 1907 edition of the Ordnance Survey map, where it appears as a hachured feature, a cartographic shorthand for a circular earthwork shown by radiating lines. It had already been mapped a generation earlier, appearing on the 1835 six-inch Ordnance Survey edition as an embanked enclosure labelled simply as a fort. By the time of more recent survey work, only the eastern arc of that enclosure remained, a bank some three metres wide and half a metre high externally, with no visible fosse, the ditch that would ordinarily run alongside such a bank, either filled in or never particularly pronounced to begin with. A stream runs roughly southeast to northwest about 45 metres to the east, the kind of proximity to water that was often a practical consideration in siting an early settlement.