The mound itself is modest in scale, roughly four and a half metres long, four metres wide, and just over a metre tall, but what it may conceal is considerably older and stranger than its unpromising surface suggests. A souterrain is an underground stone-built passage or chamber, typically constructed during the early medieval period in Ireland and associated with nearby settlement enclosures. They are thought to have served as storage spaces, refuges, or both, and they appear across the country in considerable numbers, though many, like this one, survive only as rumour beneath the ground.

The cashel in which this mound sits is itself a significant structure. A cashel is a ringfort built with stone walls rather than earthen banks, and they are common across Kerry and the wider west of Ireland, generally dating from the early medieval period, roughly 500 to 1000 AD. Local tradition at Minish holds that the oval pile of stones and earth marks the site of a cave that was at some point deliberately blocked up. Whether this happened centuries ago or within living memory is not recorded. The phrasing, that local information points to a cave which was blocked up, suggests an oral knowledge passing down through the community rather than any formal archaeological investigation. The souterrain, if it is intact beneath the rubble, remains unexcavated and unverified by direct examination.