This ringfort at Caher contains a souterrain, an artificially constructed underground passage or chamber typically built during the early medieval period, most likely as a place of refuge, storage, or concealment. The fort itself is a rath, the most common type of Irish ringfort, formed by one or more earthen banks enclosing a roughly circular area. This one measures about 27 metres in diameter and was originally defined by two banks with a fosse, or ditch, running between them.

The site has not worn well. The outer bank has been reduced in much of the circuit to what surveyors describe as a berm-like feature, a low, shelf-shaped remnant, surviving most clearly along the north-eastern to south-eastern arc. To the south, a later field boundary has been built directly over the outer bank, the kind of casual reuse that tells its own quiet story about how these monuments gradually lost their significance in the working landscape. A gap of around three and a half metres on the eastern side may be an original entrance, though the poor state of preservation makes certainty difficult. The souterrain in the interior remains catalogued but unexcavated, its full extent and condition unknown from surface observation alone.