The cashel at Gortnagroagh, in County Galway, offers almost none of that. A cashel is a ringfort built from drystone walling rather than earthen banks, and what survives here is barely enough to confirm the structure ever existed at all. A grassed-over arc of walling runs from the eastern side, curves through the south, and continues to the north. Everywhere else, the ground gives nothing away.

The site is oval in plan, measuring roughly 42 metres on its north-south axis, and it sits in rough scrubland that is prone to flooding. That combination of waterlogged ground and centuries of neglect goes some way to explaining its condition. Drystone walls, built without mortar, depend on their own weight and careful coursing to hold together; once that structure is disrupted by vegetation, livestock, or simply the slow pressure of wet ground, collapse tends to be thorough and irreversible. What remains at Gortnagroagh is less a monument than a trace, a partial outline in the grass hinting at an enclosure that once would have been a substantial presence in the landscape.