Iolo Williams explores four of Wales’s most stunning river valleys.

Episode 1
The Rheidol Valley
May 6, 2025
Iolo Williams explores the Rheidol valley and looks for elusive pine martens. He’s also treated to views of red kites nesting in a village and explores a remote zinc mine.

Episode 2
The Dyfi Valley
May 13, 2025
Iolo Williams explores the Dyfi Valley, from Ynyslas dunes and Cors Fochno bog to Ospreys at Cors Dyfi and wild Beavers near Machynlleth.

Episode 3
The Conwy Valley
May 20, 2025
Iolo explores fascinating woodlands, searches for Curlew chicks and uncovers the history of an ancient burial chamber nestled in the beautiful Conwy Valley.

Episode 4
The Vale of Clwyd
May 27, 2025
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.