Overview: Levison Wood continues his epic 650-mile journey on foot, following the annual migration of Botswana's 130,000 elephants, and faces his toughest challenge yet. Together with his guide Kane, Lev treks along the route taken by the male elephants through the immense salt pans of the Makgadikgadi, via the frontier town of Gweta, to the edge of the Okavango Delta. Along the way, he narrowly escapes being surrounded by nervous bull elephants, before enjoying the incredible experience of being up close to the same group as they drink at a waterhole.