The traces are easy to miss: faint lines of a possible bank curving from northwest to east to southwest, and what appear to be the filled-in remains of a fosse, the defensive ditch that would once have encircled the whole thing. Together they sketch the outline of a sub-circular enclosure, a form of enclosed settlement or functional space that appears widely across the Irish landscape and whose origins can range from the early medieval period back into prehistory.

What makes Ballyvadin quietly interesting is the company this enclosure keeps. Roughly twenty metres to the north sit a castle and what may be a bawn, the term for a walled or banked enclosure typically built around a tower house to provide a defended yard for livestock or household activity. Between the castle complex and the sub-circular enclosure, a curvilinear bank runs in an arc from east-northeast through east to southeast, as if linking or separating the two distinct zones. Whether the enclosure predates the castle, was incorporated into its layout, or represents something else entirely is not clear from what survives on the surface. A field boundary running north to south across the western sector has cut through the enclosure at some point, further obscuring the picture.

The remains are slight enough that a casual visitor crossing that pasture might register nothing more than a slight unevenness underfoot. The fosse has been backfilled, the bank reduced to traces, and the land long since smoothed over by agricultural improvement. What persists is a legible, if fragile, geometric ghost in the grass, most likely to be appreciated by anyone who already knows what they are looking at and where to stand.