One of the greatest joys of trekking is just how immersive the whole experience can be; feeling the incline of a mountain in your muscles or the howl of the wind, against your skin. This episode takes viewers on some of the greatest walks and treks in the world including the Inca trail in Peru, the steamy jungles of Papua New Guinea, a climb to the summit of Mount Fuji and a trek to the foot of Mount Everest, the highest mountain in the world.