These sites, found in their thousands across Ireland, are among the most common prehistoric monuments in the country, yet they remain easy to overlook. Most date to the Bronze Age and are thought to represent outdoor cooking places, where water was heated by dropping fire-cracked stones into a trough, producing the characteristic mounds of burnt and broken material that survive long after everything else has gone.

The Rathduff example sits on the southern side of a stream, a typical placement, since a reliable water source was essential to however the site was used. The spread of burnt material measures roughly twelve metres from north to south and eight and a half metres east to west, making it a reasonably substantial deposit. It lies in what is now agricultural land that has been reclaimed for pasture, meaning the ground around it has been worked and altered over time, yet the mound itself persists as a faint but legible trace in the landscape.