The one at Corgreagh in County Cavan has fared rather better, and its particular survival is part of what makes it worth attention. A raised circular area, measuring approximately 29 metres north to south and 31 metres east to west internally, it retains the outline of a double-banked enclosure, a form known as a multivallate rath, which generally signals a site of some social significance in early medieval Ireland. A rath is an earthen ringfort, typically a farmstead enclosed by one or more banks and ditches, and the presence of two banks here, separated by a wide berm, that flat shelf of ground between the outer bank and the inner ditch, points to a degree of effort and status beyond the ordinary single-bank enclosure.

The outer fosse, the external ditch beyond the outer bank, is now only legible along a stretch running from the north-north-east around through east to the south-south-east. Elsewhere it has been lost, and the outer bank itself has been modified and absorbed into a field boundary, which is a very common fate for these structures. Farmers across many generations found the existing earthworks convenient to adapt rather than remove, and so the monument survives in a partial but recognisable form. The original entrance, as with a notable proportion of Irish ringforts, faced roughly east-south-east, an orientation that recurs often enough across the country to suggest it was deliberate, though whether for practical, cultural, or symbolic reasons remains a matter of discussion among archaeologists.