This one, tucked into dense thickets roughly 115 metres north-west of the old church of Teampall Asurnaí in Eochaill, Co. Galway, is something more elemental: a bullaun, a natural or roughly worked hollow in a granite boulder, oval in plan and measuring 0.67 metres by 0.53 metres, sitting flush in the ground and perpetually water-filled. Bullauns are among the more enigmatic features of early Irish sacred sites, their origins disputed and their exact liturgical or ritual function still not fully understood. What makes this one quietly arresting is that it has never been dressed up or monumentalised. It remains exactly what it always was, a depression in stone holding water, flanked by a few rough stones on its eastern side, in a thicket.

The site clusters around the memory of a saint whose name appears in the local Irish form as Tobar Asurnaí, with the associated church nearby sharing the same dedication. Two thorn bushes stand immediately to the north-west, and one of them is still locally revered as the saint's bush, a form of veneration that survives in many parts of the west of Ireland, where a particular tree beside a well is understood to belong to the saint and is not to be cut or disturbed. Close by to the south-east stands a cross-inscribed pillar, which has been suggested, following Robinson's 1980 account, as possibly marking the reputed grave of the saint. O'Flanagan noted the site in 1927. Whether the pillar genuinely marks a burial, or simply occupies ground long associated with the saint's presence, is not established, but the combination of bullaun, sacred bush, and inscribed stone in such close proximity gives the site an unusually layered character.