Others exist only as shadows, detectable from the air but invisible at ground level, where a farmer or walker would pass over them without any sense that something old lies underfoot. The possible enclosure at Lackendarragh, on the western flank of the Galtee Mountains in County Limerick, belongs firmly to the second category.

The site came to light not through excavation or antiquarian curiosity, but through a 1984 aerial survey carried out for a very practical purpose. Bórd Gáis Éireann commissioned the photographs, reference BGE 1/5000, image 2628, as part of the planning process for the Curraleigh West-Limerick gas pipeline, taken on 3 November 1984. Among the landscape features recorded was what analysts identified as a possible enclosure in unimproved pasture, ground that had escaped the heavy ploughing and drainage works that have erased so many similar features elsewhere. An enclosure in this context typically refers to a roughly circular or oval area defined by a bank and ditch, the most common form of early settlement in Ireland, though without excavation no date or function can be confirmed here. Subsequent examination of Digital Globe orthoimagery taken between 2011 and 2013 found no surface remains visible at all, and even on Google Earth orthoimages only a faint outline persists. The record was formally compiled by Martin Fitzpatrick and uploaded to the site database in November 2021.

Visitors to the area should be aware that there is, in the conventional sense, nothing to see on the ground. The value of knowing about Lackendarragh lies less in what you might observe standing in the field and more in what the site represents: the degree to which the Irish landscape retains archaeological traces that are perceptible only from altitude, or through the coincidence of a gas company needing to photograph a route. The surrounding unimproved pasture, immediately west of the Galtee range, is the kind of rough ground where such features survive because intensive agriculture never quite reached them. If you are in the area and curious, bring satellite imagery on a phone and compare it carefully with what you see at your feet. The faint cropmark or soil differential that hints at a buried feature is a reminder that the ground here has a longer story than its surface suggests.