Wales's three National Parks make up a fifth of our countryside. Almost fifty years ago, the Brecon Beacons, Snowdonia and the Pembrokeshire coast were designated public land - breathing spaces for the Welsh people. But they need great care if they are to survive. This is the story of the dedicated wardens and rangers who spend their lives looking after them.

In this episode, exciting news for Polly and Ros in Lampeter as the medieval skeletons come back from carbon dating in America. The Snowdonia Rangers try to save the only truly Welsh daffodil before it is lost forever, while eco-warriors fight the might of the gas giants in the Beacons. Plus, the Welsh mountain pony joins the list of rare breeds in Brecon. Show less