At the start of their journey, the boats will cross two wide areas immersed in linguistic fluxes : The Rhine and Danube deltas are located at an intersection between several countries. This topography also presents different landscapes : on the western side, a highly urbanised industrial area, on the eastern side, a wild protected area (classified as Wold Heritage by UNESCO). Each departure will be marked by a first Rhine/Danube concert-performance with the participation of the artists-members of the navigating crews.