What you are looking at is a rath, the Irish term for a ringfort, a type of enclosed farmstead that was the most common form of rural settlement in early medieval Ireland, broadly from around the fifth to the twelfth centuries. Thousands survive across the island in varying states of preservation, but this one retains a legible geometry despite its overgrowth, measuring roughly 32 metres north to south and 35 metres east to west, with a bank still standing about 1.4 metres high.

The bank has two gaps of note. One to the north measures about four metres across, and a possible entrance on the south-south-east side matches it in width. That south-facing orientation for an entrance is not unusual in Irish ringforts, where practical concerns like shelter, drainage, and access to working land often shaped the layout. More intriguing is what may lie beneath the interior: a possible souterrain, which is an underground stone-lined passage or chamber typically associated with storage, refuge, or both. Souterrains are frequently found in ringfort interiors throughout Munster, though whether the one at Forenaght is intact, partially collapsed, or simply a depression that resembles one from the surface remains uncertain based on current records.