It sits beneath the grass at roughly fifteen metres in diameter, detectable only from the air, its outline dissolved into the ground over centuries of agricultural use. The experience of standing on or near it, should you somehow find the right patch of ground, would offer nothing in the way of visual confirmation that anything unusual lay beneath your feet.

What we know about this feature comes almost entirely from a single aerial photograph, reference FSI 453/2, taken in 1971. Aerial photography has long been one of archaeology's more revelatory tools: differences in soil moisture, crop growth, and ground disturbance can reveal the ghostly outlines of buried structures that are entirely invisible at ground level. Earthen mounds of this kind are found across Ireland and can represent a range of functions, from prehistoric burial monuments to later medieval gathering places or boundary markers. The Cloghran example was recorded by Geraldine Stout, an archaeologist whose work has done much to document exactly these kinds of quietly vanishing features across the Irish landscape.

Cloghran itself lies in north County Dublin, close to Dublin Airport, and the area has seen considerable development pressure over the decades since that photograph was taken. The pasture field noted in the record may or may not survive in its original form, and the mound, never conspicuous to begin with, remains invisible at ground level. For anyone with an interest in how much of Ireland's archaeological inheritance exists only in archive photographs and site records rather than in anything you can walk up to and touch, this entry is perhaps more instructive as a category than as a destination. The 1971 photograph, held within the relevant aerial survey collection, is likely the closest any of us will get to actually seeing it.