Adventurer and naturalist Steve Backshall embarks on one of the most dramatic and dangerous expeditions filmed by a BBC crew - to explore Venezuela’s tepuis, the ancient, sheer-sided mountains of Canaima National Park. With a team of expert rock climbers, Steve attempts the first ascent of a remote, unclimbed tepui to search for wildlife on the summit. The month-long expedition will see Steve and the team scaling untouched mountain cliffs, caving inside the tepuis and abseiling off the highest waterfall in the world. Along the way, the team battles against freak weather, rock fall and some very dangerous wildlife. This adventure series unfolds against the awe-inspiring backdrop of Venezuela’s tepuis – a strange and spectacular landscape. These enormous and isolated jungle mountains were the inspiration behind the popular animated film Up – it is a landscape with the power to thrill and astound.