n this episode, Gus finds himself in Aoraki Mt Cook National Park, where 140 peaks above 2000 metres tower over the landscape. There is virtually no flat land in the entire park, and a third of it is permanently covered in ice and snow. To get a really good look at this Park, Gus starts his exploration by air. The Southern Alps are one of the most rapidly rising mountain ranges in the world. And, at the rate they grow they would be the tallest range in the world, but temperature shifts from freezing to thawing combined with high rainfall have instead created one of the steepest, unstable landscapes in the country.