Simon Reeve travels across the Kalahari in southern Africa. Covering half a million square miles of desert and scrubland, it's one of the last great unspoiled African wildernesses, sitting on top of a vast basin of sand that in places reaches up to a mile in depth.

Simon tracks wildebeest with a group of one of the region's indigenous inhabitants, the San, who are renowned for their hunting and tracking techniques. And he visits the Okavango Delta, which is transformed each year by seasonal rains from a desert to an oasis of greenery.

Simon Reeve voyages across the Coral Triangle, a huge wilderness of tropical seas and jungle clad islands in the southwest corner of the Pacific that's been described as the Amazon of the seas. Surrounded by the Philippines, Malaysia and Indonesia, the Coral Triangle is one of the most beautiful and biodiverse corners of our oceans, crucial to the health of the wider marine environment.

Simon Reeve travels through wilderness of Patagonia, at the foot of the South American continent. A beautiful and rugged land of mountains, ice and endless wild grasslands, Patagonia is whipped by wind, rain, and snow.

Simon's journey takes him up to the huge south Patagonian ice field, through the foothills of the Andes towards the great Grey Glacier of eastern Chile - coming face to face with pumas and riding with gauchos.

Simon Reeve travels through the Congo, the second-greatest rainforest on earth. In one of the toughest journeys he's ever undertaken, Simon travels five hundred miles across dense tropical jungle, heading for the region of Salonga, where he searches for one of the rarest and most iconic creatures on the continent - the bonobo.