The site at Kilpoole was identified not through excavation or standing remains, but through a cropmark, the faint differential in vegetation colour and growth that appears in aerial photographs when buried ditches or banks alter how soil retains moisture. In this case, the cropmark revealed an oval enclosure roughly 32 metres east to west and 25 metres north to south, defined by a fosse, that is, a ditch cut into the ground, which would originally have enclosed some interior space of uncertain purpose.

The photograph that captured this outline was taken as part of the Cambridge University Collection of Aerial Photography, a programme that produced an extensive archive of oblique and vertical aerial images across Ireland and Britain from the mid-twentieth century onward. The image, catalogued as BDJ 84, caught the enclosure when conditions were right, likely during a dry summer when parched grass above the filled ditch turned a slightly different shade to the surrounding field. Oval enclosures of this general type and scale are known from across Ireland and are often associated with early medieval settlement or activity, though without excavation it is impossible to say more about Kilpoole's date or function. The site sat on level ground, which is itself a mild distinction; many comparable enclosures occupy elevated or defensible positions.

The enclosure no longer exists as a recoverable feature in any practical sense. The housing development that now covers the area has disturbed or buried whatever remained of the fosse, and there is nothing on the ground to indicate that anything lies beneath. The site survives only in the aerial record and in the documentary description that followed from it, a common fate for low-lying, undefended enclosures that left no upstanding trace above the soil.