These are the scorched and waterlogged remnants of Bronze Age cooking sites, typically consisting of a horseshoe-shaped mound of fire-cracked stone beside a trough dug into the earth. The method involved heating stones in a fire, dropping them into a water-filled pit until it boiled, and using that heat to cook meat. They appear in their thousands across Ireland, usually in low-lying or marshy ground, and the one at Park is simply a quiet presence in the field, unremarked by most who pass it.

Fulachtaí fia date broadly to the Bronze Age, roughly 1500 to 500 BC, though some examples have produced earlier or later dates. The characteristic mound of shattered, heat-fractured stone, often dark and greasy-looking from repeated burning, is the main visible trace left behind. The troughs themselves are rarely visible above ground. Alternative theories about their function have circulated among archaeologists over the years, including use for textile dyeing or bathing, though the cooking explanation remains the most widely accepted. The example at Park is recorded as a monument but, beyond its location in Mayo, the specific details of its size, condition, and any associated finds are not currently available in the public record.