What draws attention is the inconsistency of its boundary: on one arc, a proper earthen bank survives, running from north through east to west; on the other, the ground simply drops away in a natural-looking scarp, which nonetheless serves the same enclosing function the original builders intended. It is the kind of place that rewards a second look, once the eye learns to read the landscape rather than search for something more obviously monumental.

The site is a rath, the Irish term for a ringfort, a form of enclosed farmstead that was built and occupied mainly during the early medieval period, roughly between the fifth and twelfth centuries. Tens of thousands of these earthworks were constructed across Ireland, each typically consisting of a circular or subcircular bank and an external fosse, the fosse being the ditch from which the bank material was dug. This example at Dalgin measures approximately 45 metres north to south and 42 metres east to west, making it a reasonably substantial specimen. The fosse remains visible along the southern and western sides, though quarrying has eaten into the monument at the west, leaving that section compromised. Inside the enclosure, five small earthen mounds are present, though these appear to be of modern origin rather than anything archaeologically significant, an oddity that sits unexplained within an otherwise ancient outline.