That one exists at Kells in County Clare, recorded as a monument of sufficient interest to warrant formal archaeological classification, is enough to prompt curiosity about what it crosses, how old it is, and who built it. The landscape of Clare, with its drumlin fields, turloughs, and low-lying boggy ground, has always demanded engineering solutions from the people living in it, and causeways of various periods, from early medieval trackways to post-medieval estate works, appear throughout the county. This one, in the townland of Kells, sits quietly in the record without much elaboration.