A fulacht fia is a type of prehistoric cooking site, typically a horseshoe-shaped mound of burnt and shattered stone left behind after repeated cycles of heating rocks in a fire and dropping them into a water-filled trough to bring it to the boil. They are among the most common archaeological monument types in Ireland, yet they remain quietly enigmatic: the majority date to the Bronze Age, between roughly 1500 and 500 BC, and their purpose, whether for cooking, bathing, brewing, or some combination, is still debated. The one at Coolknedane has the distinction, if it can be called that, of being entirely swallowed by forestry plantation, rendering it inaccessible to anyone who might wish to stand beside it and consider those questions.