Secrets of Britain's Great Cathedrals

Wales: St. David's, Brecon, St. Asaph and Bangor Cathedrals (Tintern Abbey and Strata Florida) (1x7)

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Stepping across the border of England and into Wales, we take a journey to the north - exploring along the way the incredible cathedrals, abbeys and ancient ruins pocketed in the green valleys and rocky contours of this magnificent country.