Derek explores two popular Welsh tourist sites, before setting off to discover their more secret side. His first walk begins at Porthmadog harbour, before crossing the cob and arriving at the Italianate village of Portmeirion, and discovering 'Y Gwyllt' the wild headland beyond. It's then time for a treasure hunt, as he visits the Roman gold mines at Dolaucothi, before breaking out into some beautiful countryside to take up their trig point challenge, and reach the highest point on the estate.

Week three and it's a weather presenter's day out, as Derek's first walk sees him shown around beautiful Three Cliffs Bay in Gower by his weather team colleague Behnaz Akhgar. She tells him about her life in Iran before moving to Wales and why Three Cliffs Bay is her favourite place in the world. Next it's Powys and to the market town of Welshpool. Derek uncovers some of its hidden history before taking a stroll through the Powis estate deer park, and marvelling at Powis Castle with its bizarre yew hedges. It's then a waterside walk along the Montgomery canal and back to town.