This one in Ballyfauskeen, County Limerick, offers nothing of the sort. It exists, in practical terms, as a shape that was briefly legible from the air and has since returned to complete invisibility, leaving behind only a record number and a handful of archived photographs to confirm it was ever there at all.

The enclosure came to light not through excavation or fieldwork but through a pipeline project. Aerial photographs taken on 3 November 1984 for the Bórd Gáis Éireann Curraleigh West-Limerick gas pipeline survey, shot at a scale of 1:5000 and catalogued as frame 2611, No. 371, captured what analysts identified as a sub-rectangular enclosure sitting in reclaimed pasture immediately west of a local road. A second earthwork, recorded separately under the reference LI049-243, lies roughly 100 metres to the northwest, suggesting this part of Limerick once held more organised human activity than the smoothed-over fields now imply. What makes the Ballyfauskeen enclosure particularly elusive is that it never appeared on the historic Ordnance Survey Ireland maps, meaning it slipped through the standard layers of documentary record entirely. By the time Digital Globe orthoimagery was captured between 2011 and 2013, and subsequently on Google Earth imagery, no surface trace remained at all. The site is registered in the national record, compiled by Martin Fitzpatrick and uploaded in October 2021, but its form and date remain uncharacterised.

There is, in truth, little for a visitor to observe on the ground. The field sits west of a local road in reclaimed pasture, the kind of agricultural land that has been drained and levelled over generations until earlier features are pressed flat beneath it. The enclosure's sub-rectangular outline, the sort of shape associated broadly with early medieval settlement or field organisation in Ireland, is no longer readable without aerial or remote-sensing equipment. What the site offers instead is a quieter kind of interest: the knowledge that even well-surveyed rural counties contain features that only became known through a single pass of a camera decades ago, and that have since gone dark again.