Rising high above the surrounding moorland, The Chains forms the vast, windswept roof of Exmoor National Park. Join veteran journalist Martin Hesp as he traverses this remote upland bog, tracing the secret source of the River Barle and uncovering the story behind John Knight’s man-made expanse at Pinkery Pond.

West of Dunkery Beacon lies a vast, primeval expanse that feels closer to the Russian steppes than southern England. Travel writer Martin Hesp leads a five-mile loop through this untouched wilderness—tracing John Knight's unfinished industrial canal, dropping into the remote moorland zone known as Beckham, and visiting the shell-blasted ruins of WWII-era Larkbarrow Farm.