The Irish name An Poll Talún translates simply as "hole in the ground", and the cave it describes is modest enough in dimension: an entrance roughly 0.9 metres wide and 0.6 metres tall, opening into a low limestone passage that branches into separate chambers, each between three and four and a half metres wide but only about 1.2 metres high. At no point inside can a person stand upright. What makes Poultalloon quietly interesting is not grandeur but ambiguity: despite its distinctive form and the fact that it gave an entire townland its name, no archaeological activity has ever been confirmed within it, and it has never been properly investigated by modern methods.

The cave appears in the Ordnance Survey Field Name Books for Fedamore Parish, which record that its various branches had not been explored at the time of survey, and that the townland itself was understood to derive its name from the cave. By 1897 it was annotated in Gothic script on the 25-inch Ordnance Survey map, though it had not appeared at all on the earlier 1840 six-inch edition. Writing in 1942 or 1943, O'Kelly described it as a natural cave in limestone rock, taking the form of a long, low passage. Limestone caves of this kind are not unusual in Munster, formed over millennia by slightly acidic groundwater dissolving soluble rock, but caves of any size sometimes yielded evidence of human use, whether as shelters, places of deposit, or ritual spaces. Dr. Marion Dowd, a specialist in Irish cave archaeology, confirmed that no such evidence has been recorded here, though the absence of thorough modern investigation leaves the question open.

Anyone hoping to visit faces an immediate difficulty: surveyors from the Archaeological Survey of Ireland found no surface remains visible, reporting that the cave entrance had been filled in with rocks and earth. The site sits in rocky pasture on the south-facing slope of an east-west ridge, with open views stretching to the west and south-west, which at least makes the general area pleasant to walk. Locating the precise spot requires some prior research, and there is nothing to see at the surface in its current state. The interest here is less in what can be observed and more in what remains unresolved, a named place with an unexplored interior, sitting quietly in a field.