Expecting to highlight the significance of imaginaries in the construction of specific ideas about nation, progress and development in Argentina, we introduce two cases located in two places of Parana River (the Delta's islands and the central section). In both, the three ideas -mobilized by imaginaries constructions- were materialized in territorial transformation proposals. The analysis has allowed to show the appropriation strategies developed by dominant elites to impose an exclusive model of territorial order, based on their own interests.