The term points toward human intention rather than natural accident, suggesting that at some point in Crannagh's past, someone with means and a particular vision chose to alter the ground in a considered way.

Beyond its classification and location, the available detail on this site is thin. Without further documentation of its origins, the names of those who commissioned or designed it, or the period in which it was laid out, little more can be said with confidence about its specific history. What can be said is that designed landscape features of this kind are often the last legible traces of landed estates that have otherwise vanished entirely, their houses demolished or ruined, their families long gone, leaving only a ha-ha wall, a tree line, or some subtle change in ground level to indicate that the land was once ordered according to someone's careful plan.