A fulacht fia is a Bronze Age cooking place, typically consisting of a horseshoe-shaped mound of fire-cracked stone built up over centuries of use beside a water source. Stones were heated in a fire and dropped into a water-filled trough to bring it to the boil, a method that leaves behind a characteristic scatter of darkened, fragmented rock. The mound at Garryvoe measured roughly eleven metres east to west and over sixteen metres north to south, making it a reasonably substantial example of the type.

The site no longer survives as an upstanding feature. Around 1980 it was levelled, leaving only the grass-covered spread of burnt material that was later recorded. That loss is not unusual. Fulachtaí fia across Ireland have been ploughed out, built over, and otherwise erased at a considerable rate, particularly during the latter half of the twentieth century when agricultural intensification removed many low earthworks that had endured for three millennia or more. The proximity to a stream, a defining characteristic of the monument type, points to how deliberately these sites were positioned. Water was not incidental to the process but central to it, and the consistent pairing of burnt mound and running water is one of the clearest signatures archaeologists use to identify the type even when the mound itself has been reduced to little more than a soil discolouration.