At Effin in County Limerick, a spring known as Lady's Well does exactly that, tucked into the fosse, the encircling ditch, of an earthwork enclosure that was already old when the well acquired its Marian name. The two features share a site that also sits within easy reach of medieval church ruins and a graveyard, creating a layered cluster of landscape history in what is now ordinary reclaimed pasture.

Ringforts, sometimes called raths, were the most common form of enclosed settlement in early medieval Ireland, typically consisting of a circular or roughly oval area defined by one or more earthen banks and ditches. They served as farmsteads and enclosures for livestock rather than military fortifications in any serious sense. The Effin example shows up on the Ordnance Survey six-inch map of 1840 as a polygonal enclosed area with the holy well marked on its southern side. By the time the twenty-five-inch map was produced in 1897, it was recorded as a raised irregular landform roughly twenty-one metres north to south and thirty-six metres east to west, its edges defined by a scarp and partly reshaped by field boundaries added after 1700. Writing in 1955, the folklorist and scholar Caoimhín Ó Danachair noted the site simply and practically, describing it as a good spring in the fosse of a ring fort. The nearby church ruins and graveyard lie about 144 metres to the south-south-east, suggesting this small area accumulated sacred and communal significance over many centuries.

On the ground today the monument reads as a roughly rectangular area, approximately twenty-three metres by seventeen metres, outlined by scrubby bushes with a gap on the south-west side, consistent with what satellite imagery captured between 2011 and 2013. It sits 85 metres north-west of the townland boundary with Gortacrank. Visitors approaching through the surrounding pasture should look for the slight raised profile of the interior platform and the depression of the fosse, which is where the well itself sits. The proximity of the church ruins and graveyard makes it worth treating the immediate area as a group of related monuments rather than isolated features, each one helping to explain the persistence of the others.