Laos, which lived in isolation for many years, is still today home to dozens of forgotten ethnicities. Its nature is sumptuous and wild, like its wild mountains and its impenetrable jungles. At the wheel of an imposing Russian truck, aboard a speedboat speeding down the Mekong, on the back of an elephant or on foot through the jungle, the roads of the impossible offer an unusual journey, from south to north, through the most difficult axes of communication in the country.