At roughly fifteen metres along its longer axis and still standing 1.3 metres high, it is a substantial presence for something most people would walk past without a second thought. At its centre is a noticeable hollow, nearly six metres across and dropping some 1.5 metres, which gives the whole structure a slightly sunken, crater-like appearance.

This is a fulacht fia, a type of prehistoric cooking site found in enormous numbers across Ireland, particularly in low-lying or waterlogged ground near streams. The basic principle involved heating stones in a fire, dropping them into a water-filled trough, and bringing the water to a boil, repeatedly, until food could be cooked. The burnt, shattered stones that result were discarded into a crescentic or oval mound around the trough, which is exactly the kind of material that forms this mound. The central depression here is thought to be the result of material having been taken away rather than an original feature of the site. Bowman, writing in 1934, noted that a great part of the burned stones had already been removed from the surface by that point, which explains both the hollow and the somewhat diminished profile the mound presents today. It is a reminder that even sites this old are not immune to gradual, mundane attrition, stones carted off for walls or paths or simply cleared from pasture over the generations.