Castell y Bere was a remote outpost on Llywelyn’s southern frontier, but it was vital to his security. It guarded his cattle range, protected the homeland of Gwynedd and dominated the neighbouring lordship of Meirionydd. In medieval Wales cattle were as good as currency. This location was so important that Llywelyn was prepared to take it from his own son Gruffudd in 1221, so that he could begin building a castle. After Llywelyn died his successors continued to use it. It was taken by English king Edward I, in 1283. He made alterations to the castle and hoped an English frontier town would grow here but the English abandoned the site during an uprising against their rule in 1294. Today Castell y Bere is as wild and remote as it was when Llywelyn first arrived. It stretches along the summit of a rocky outcrop on the eastern side of the Dysynni valley. The picturesque and remote location makes it difficult to appreciate that this sprawling stronghold once controlled an important routeway running up from the coast at Tywyn northwards through the mountains towards Dolgellau and protected the southern border of Gwynedd.