What makes it worth pausing over is precisely that imperfection. The enclosing earthen bank, which once defined a farmstead of the early medieval period, survives to a height of just under a metre, stone-faced in places and buried under dumped material in others. It is the kind of site that rewards attention rather than spectacle.

A ringfort, sometimes called a rath when it is earthen in construction, is the most common monument type in Ireland, with tens of thousands recorded across the country. They functioned primarily as enclosed farmsteads, typically dating from roughly the fifth to the twelfth century, and their circular banks and ditches were as much about defining social status and livestock boundaries as about defence. The Lissurla example follows the standard pattern: a roughly circular interior, a fosse or outer ditch surviving to a depth of around 0.6 metres on the north-western side, and a gentle internal slope towards the south. There is some evidence of disturbance to the northern portion of the site, suggesting interference at some point, though the nature of that interference is not recorded in detail. The bank, where it can be read, shows traces of stone facing, indicating that whoever built and maintained it had access to local stone and used it to reinforce the earthwork.