Tre'r Ceiri, Trefor, showing part of the rampart in the more sheltered part which still has the remnants of a dry stone pallisade on top of the rampart wall. It is not known whether this pallisade was a feature of the entire rampart system, but it seems quite feasible. This image shows the other two peaks which also form part of Yr Eifl mountain and the effects of the quarrying on the furthest peak. Taken 22 December 2009.