Running down the hillside to an entrance set in the northwest corner of the medieval vaccary (cattle ranch) of Hen Ddinbych (NPRN 303472) is a 125m long hollow way 5.4m wide and up to 1m deep.

This hollow way was surveyed as part of the 2009 RCAHMW survey of the Hen Ddinbych landscape (NPRN 411894)

Louise Barker, RCAHMW, October 2010