大象传媒

Julia Bradbury and John Craven explore the Snowdonia National Park. It is home to some of our mightiest mountains, which overlook an extraordinary countryside. Its sweeping views have been captivating visitors for centuries. Julia ventures on to Snowdon to combine her passion for walking with her sense of adventure when she tries her hand at scrambling. When you're out on the mountain, you need to be prepared; Julia also learns about a new scheme to aid walkers out on the ranges, and gets to grips with life as a mountain leader.

Beneath its peaks, John discovers a hidden valley that reveals a Celtic rainforest. Its damp conditions make it a special place for some of our finest and rarest plants.

Elsewhere, Tom Heap investigates genetically modified crops. More than a decade after being described as 'Frankenstein food', GM is back in the spotlight. Tom finds out whether a new generation of GM crops really will give us a healthier, more prosperous future. And down on the farm, Adam's new Belted Galloway bull finally arrives.