Souterrains are man-made passages or chambers, typically constructed from dry-stone walling and roofed with large capstones, then buried beneath the earth. They are found in considerable numbers across Ireland, and their exact purposes have been debated for generations; cold storage, refuge, or simply a place to keep things out of sight and reach are among the explanations most commonly advanced.

The townland name itself carries history in its syllables. Doire Uí Ríordáin, roughly translated, gestures toward a place associated with the Ó Ríordáin family, one of the Gaelic Irish families whose presence shaped this part of Cork over many centuries. The "Thuaidh" element simply means northern, distinguishing this townland from a southern counterpart nearby. Beyond the fact of its existence and location, the specific details of this souterrain, its dimensions, construction, date, condition, and any associated finds, remain to be set out in a publicly accessible form.