Iolo Williams explores the Dyfi Valley, from the Ynyslas dunes and the Cors Fochno bog to ospreys at Cors Dyfi and wild beavers near Machynlleth.

Iolo Williams explores the Vale of Clwyd, from coastal lizards and rare butterflies to a tame raven and elusive red squirrels, uncovering the valley's hidden wonders and wildlife.