In flat pasture in Athlacca North, County Limerick, an oval earthwork makes itself known only from above, its outline emerging as a cropmark, the kind of faint discolouration in vegetation that aerial photography occasionally catches when buried or levelled features interfere with how soil retains moisture and nutrients. At ground level, there may be little or nothing to see.

The platform measures roughly 26 metres north to south and 30 metres east to west, defined by a scarp, which is a low slope or edge in the ground surface that marks the boundary of a raised or cut feature. It sits in open pasture, positioned 36 metres east of the townland boundary with Glenma and 86 metres south of another townland boundary, placing it in a marginal zone between named territories. Curiously, the feature does not appear on the Ordnance Survey Ireland six-inch sheet published in 1840, one of the most thorough landscape surveys of the period. It does appear on the later 25-inch edition of 1897, suggesting either that it was recorded for the first time in the intervening decades or that earlier surveyors simply passed over it. A related enclosure, catalogue reference LI039-008, lies approximately 250 metres to the southwest, hinting that this was once a more populated stretch of ground than its current emptiness suggests. The monument record was compiled by Fiona Rooney and uploaded in April 2021.

Because the feature survives primarily as a cropmark rather than an upstanding earthwork, a visit on the ground demands patience and a willingness to look carefully at the surface of the field for any subtle change in elevation or texture. The best conditions for spotting cropmarks from the ground are during dry summers, when grass stress reveals buried features most clearly. Aerial imagery, including the OSi orthophotographs taken between 2005 and 2012 and corresponding Google Earth images, offers the most legible view. The surrounding land is private farmland, so access would require permission from the landowner.