When a large flagstone was lifted during ground clearance for house construction, it revealed what local accounts describe as an underground passage. The stone was replaced almost immediately, the tunnel left uninspected, and the ground moved on above it.

What lies beneath is almost certainly a souterrain, a type of man-made underground passage or chamber constructed during the early medieval period, typically associated with nearby settlement sites. They were built for storage, refuge, or ventilation, and are often found in close proximity to ringforts, the circular enclosed farmsteads that pepper the Irish landscape. This example at Glandine sits around 100 metres south-west of exactly such a site, a ringfort that has its own souterrain already recorded. The pairing is not unusual; souterrains frequently occur in clusters within the same agricultural territory. What makes this particular example quietly remarkable is simply the manner of its near-discovery. A flagstone lifted, a void glimpsed, a decision made to cover it back up and say nothing further to the ground.