That designation alone sets it apart from the ordinary. Field boundaries, easy to overlook beside more dramatic ruins, are among the most revealing features in the Irish landscape. They can mark the edges of medieval strip cultivation, Bronze Age land divisions, or early Christian farming enclosures, and in many cases they represent the earliest surviving evidence of organised human activity in a given place. On an island like Davillaun, where the population has long since gone and the land has not been extensively disturbed by modern agriculture, such a boundary may retain a clarity that mainland equivalents have lost to centuries of ploughing and drainage work.