It was identified entirely from the air, spotted in aerial photographs on Bing Maps and Google Earth, which says something about how much of Ireland's archaeological landscape still waits to be formally noticed. The enclosure measures approximately 35 metres in diameter, putting it broadly in the range of a ringfort, the type of enclosed farmstead built across Ireland during the early medieval period, typically between the fifth and twelfth centuries. What gives the site an additional layer of interest is a feature in its south-western corner that appears to be a barrow, a burial mound, suggesting that whoever used or later encountered this enclosure may have treated one corner of it as a place of some significance beyond the domestic.

The site was compiled by Denis Power and uploaded to the record in June 2013. The reference number assigned to the possible barrow, LI014-155002-, places it within the Sites and Monuments Record for County Limerick. Beyond what aerial photography can reveal, the details of the site remain sparse. No excavation record is attached to it, and the relationship between the enclosure and the barrow within it has not been formally investigated. It is not uncommon in Ireland for ringforts or enclosures to be associated with earlier burial features; the presence of a mound may have lent the spot a sense of ancestral weight that later inhabitants respected or incorporated into their own use of the land.

Knockatancashlane is a townland in County Limerick, and like many such sites identified primarily through remote sensing, the enclosure may not be immediately obvious at ground level. Earthworks of this kind can be heavily degraded, visible mainly as subtle rises in pasture or as crop marks during a dry summer when grass above buried features changes colour ahead of the surrounding field. Anyone visiting the broader area should bear in mind that the site sits on private agricultural land, and that nothing about its current condition on the ground has been documented in the available record. The aerial images remain, for now, the clearest picture of what is there.