The mound measures roughly 22.5 metres on its longest axis, which makes it a substantial example of its type, yet it sits quietly in the grass with nothing to announce what it once was.

This is a fulacht fia, a category of prehistoric cooking site found in enormous numbers across Ireland, particularly in low-lying, waterlogged ground near streams or springs. The typical interpretation is that stones were heated in a fire, dropped into a trough of water to bring it to the boil, and used to cook meat, though some researchers have proposed additional uses including textile processing or brewing. The characteristic result is the horseshoe-shaped or irregular mound of fire-cracked, heat-shattered stone that accumulates over repeated use. At Curraghnalaght, the proximity to a natural spring would have provided a ready water source, and the fact that burnt material was used to partially infill that spring suggests the site saw sustained, repeated activity rather than a single occasion. What makes the location quietly unusual is that a second fulacht fia lies only 16 metres to the east, meaning two of these features occupy the same small area of ground, perhaps reflecting the particular appeal of the spring as a focal point across generations.