These sites, found in their thousands across the island, typically present as a low, horseshoe-shaped mound of burnt and cracked stone, usually positioned close to a water source. The mound is the accumulated debris of repeated use: stones were heated in a fire, then dropped into a water-filled trough, bringing the water rapidly to a boil. What exactly this process was for has been debated for decades, with cooking the most widely accepted explanation, though experimental archaeology has since demonstrated that the same method works equally well for brewing, bathing, or treating textiles.

Fulachtaí fia belong broadly to the Bronze Age, with most dated to somewhere between 1500 and 500 BC, though some sites have earlier or later phases of activity. They are a particularly dense feature of the Irish midlands and west, and their presence in a townland like Doughiska, now largely absorbed into Galway's expanding suburbs, is a reminder that this landscape was actively managed and inhabited long before any urban development. The specific details of this example, its dimensions, condition, and precise location within the townland, are not fully documented in the available record, which means it sits quietly in the planning and heritage registers as a protected monument without much accompanying narrative.