In the final programme of this series, weatherman Derek Brockway heads off on another two wonderful walks in Wales. In the first walk, at the very top of the Rhondda Valley, Derek climbs past cascading waterfalls to the top of the iconic flat-topped summit of Pen Pych and onwards to find the source of the river Rhondda. Then, in the foothills of Cader Idris, he sets off on the Talyllyn railway for a glorious riverside walk from Abergynolwyn to the romantic Castell y Bere, a 13th-century Welsh stronghold, and then follows in the footsteps of Mary Jones, a fifteen-year-old girl who, back in the year 1800, walked 26 miles barefoot to buy a Welsh bible. Show less