It measures roughly eleven metres across, defined by a stone bank so low and grass-covered that it barely registers as you approach; at its highest point it rises only thirty centimetres from the ground. Walk the circuit and you can trace it almost in full, except where a cattle crush has been set up against the north-eastern arc, nudging the ancient and the agricultural into an awkward proximity. The interior is flat, not raised above the surrounding field, and scattered with loose stones, some of them half-swallowed by the ground.

What makes the site genuinely puzzling is the smaller feature sitting roughly at its centre. A subcircular setting of stones, about three metres across overall, encloses a flat space of between one and a half and two metres in diameter. The largest stone is a low upright on the south-western edge, no more than twenty-five centimetres tall. The arrangement reads as deliberate rather than natural, but its purpose has not been established. Possibilities range from a house site with a central hearth to some form of burial monument to the remains of an animal pen. The karstic landscape of County Clare, shaped by the same limestone geology as the Burren to the north, naturally produces irregular stone concentrations, but surveyors concluded that this setting is artificial. About two hundred and fifty metres to the south-west lies a holy well accompanied by eight penitential stations; penitential stations are a series of marked stopping points used in traditional Catholic prayer circuits, often associated with early Christian sites. A further five penitential stations stand roughly one hundred and ninety metres to the east. The enclosure sits on the road connecting these two clusters, though whether that proximity is meaningful or simply coincidental remains an open question. Termon itself, as a place name, derives from the Irish tearmann, meaning sanctuary land, typically ground held by a church or monastic community and enjoying certain legal protections in early medieval Ireland. Whether that etymology has any bearing on what stands in this field is, like the enclosure itself, unresolved.