At Liscreagh in County Cork, a ringfort once occupied a roughly circular area of around 28 metres in diameter, its earthen banks enclosing the kind of defended farmstead that was common across Ireland during the early medieval period. Today there is nothing to see at ground level. The site has been levelled entirely, leaving no visible surface trace, which makes the story of its gradual disappearance across successive maps quietly compelling.

The Ordnance Survey six-inch map of 1842 recorded it clearly, using hachuring, the cartographic convention of short radiating lines used to suggest raised earthworks, to mark a well-defined circular enclosure. By 1904 and again in 1936, later editions of the same map showed only partial traces, with the eastern to north-eastern arc still indicated but the rest already fading from the record. A note by Broker in 1937, citing a description associated with Pat Hickie, may refer to this same fort. That account described a structure of about a quarter of an acre with a double fence, of which only around ten spades' breadth, roughly 17 metres, of the outer bank was still standing at that time. A ringfort with a double enclosing bank or fence would have been a reasonably substantial example of the type, suggesting a site of some local significance in its day. The correspondence between the mapped enclosure and the described remains is plausible but not certain.

What remains now is essentially a cartographic ghost, traceable through the sequence of OS editions but absent from the land itself. The value of a site like this lies less in any physical visit than in what the successive maps reveal: a structure still legible in 1842, fragmenting across the following century, and gone before anyone thought to record it in detail.