To a passing eye it reads as ordinary farmland, yet beneath the surface lies a souterrain, a type of man-made underground tunnel or chamber associated with early medieval settlement in Ireland, typically used for storage, refuge, or both. This one, at Gorteenaniska, runs roughly north-northeast to south-southwest, and measures around 1.3 metres in width. The entrance is blocked, so the full extent of its interior remains unconfirmed, but the alignment is clear enough from external inspection.

What makes the site quietly compelling is the additional feature to its west: a faint straight bank, traceable for roughly 28 metres, suggesting that the souterrain did not exist in isolation. Banks of this kind are often the last visible remnant of an enclosure associated with an early settlement, the sort of earthwork that might once have defined the boundary of a farmstead or small defended homestead. The combination of a souterrain and an adjacent enclosure bank is a recognisable pattern in the Irish archaeological record, linking this unremarkable-looking field to a period, probably somewhere in the first millennium, when someone chose this flat ground as a place to live, store goods, and perhaps shelter in times of trouble.