Story : We will travel to Asia with Nicolas Hulot along the Mekong, a river over 4,000 km long, to discover the people who still live along the river. We will follow him into caves, inside waterfalls, in Buddhist temples, flying over forests and floating houses, to reach the lost city of Beng Melea, a short distance from the historic site of Angkor Vat, the famous temple-mountain, with its five ringed towers, erected at the time our cathedrals were built and immersed in the jungle. Nothing remains of the living beings that populated the Earth thousands of years ago. Everything has been pulverized. But in some cases, thanks to the fossilization of animals and plants, today we can reconstruct the skeletons of dinosaurs, or entire forests of prehistory. This is what happened in Argentina, where Alberto Angela and Michelangelo Pepe went to film an extraordinary example of a petrified forest, with the trees still all aligned.