This national route (following the old trading route for 75 miles) takes in the medieval town of Ruthin, with its Craft Centre and Gaol. And then on to those big ol’ fortresses: Beaumaris, Caernarfon and the walled citadel of Conwy, together with Harlech, form a formidable UNESCO World Heritage site – Edward I’s ‘Iron Ring’ of world-class Welsh castles. Conwy Castle image: © Crown copyright Visit Wales.