That path and its planting are not ancient features; they were added as decorative improvements by a former owner of the house. What lies beneath them almost certainly is ancient, and the question of what exactly the mound represents has been quietly debated for centuries.

In 1750, the Cork historian Charles Smith described it as a 'high sepulchral mount', placing it in a tradition of burial mounds common across prehistoric Ireland. That interpretation is plausible enough, but a competing theory points in a rather different direction. The mound may be the remnant of a motte, the type of earthen castle mound introduced to Ireland by the Normans in the twelfth century, typically topped with a timber tower and surrounded by an enclosed yard called a bawn. If that identification is correct, the site could correspond to what was referred to in the twelfth century as the castle of Del Cora, a name that shares its root with Ballynacorra itself and with the river the garden overlooks. Researcher O'Kelly noted in 1945 that the trees and the decorative spiral path are modern additions, implying that even by then the original character of the earthwork was already obscured by layers of landscaping.

The mound sits within the private grounds of Ballynacorra House and is not a public site, so the view most visitors are likely to get is from a distance. Its silhouette, tree-crowned and tidily spiralled, gives little away about whether it began as a burial place, a Norman fortification, or something else entirely. That ambiguity is rather the point.