On a westward-facing slope in Knockanearis, County Waterford, a ring of raised earth sits quietly beneath a tangle of scrub, easy to miss and easier still to misread. What looks at first like a natural undulation in the ground is in fact a carefully formed enclosure, circular in plan, with an earthen bank still standing between one and a half and two metres high on its outer face. The fact that no ditch, or fosse, accompanies it sets it apart from the more familiar profile of a rath or ringfort, where an external trench dug to create the bank is usually the first thing to catch the eye.

The enclosure measures 33.5 metres across its north-south axis, with a bank between 4.5 and 6 metres wide and a modest but well-preserved internal height of 1.4 to 1.7 metres. A single entrance, just 2 metres wide, faces west, towards a stream that runs roughly north-north-west to south-south-east about 180 metres away. That orientation and proximity to water are details that recur across early Irish enclosed sites, where running water carried practical, and sometimes ritual, significance. Without a fosse, the bank here was not built by piling up spoil from a surrounding trench in the usual way, which raises quiet questions about how it was constructed and what its original purpose was. Embanked enclosures of this type are sometimes associated with early medieval settlement or with ceremonial use, though without excavation it is difficult to say anything more definite about the people who shaped this particular piece of ground.