At a time when environmental emergencies have become the order of the day on the political agendas of cities and governmental bodies at various territorial scales, it seems useful to take a fresh look at the heritage - natural, cultural and socio-economic – represented by 'blue infrastructures' within urbanised territories, and at the potential they express. The aim of this project proposal is therefore to identify in each of the represented cities - Torino, Belgrade and Lisbon - a critical, unresolved place crossed by water that poses complex challenges to cities, but at the same time offers great opportunities for urban regeneration. Three waterways to be considered as effective natural devices for rebalancing the environment, reconstructing ecological corridors that go beyond the urban scale, aiming at wider territorial networks. Social devices, because they reconnect different communities that frequent those places, encouraging exchange and contamination. Cultural devices, because they contribute to the strengthening of their identity, the stratification of collective memory and the sense of belonging of people who frequent them, building cultural heritage. In other words, valuable resources that are able to embody and reaffirm the principles of beauty, sustainability and inclusiveness at the core of the New European Bauhaus. Reaffirming the urban potential of such territories means, in the first instance, to systemize the knowledge of places and delve into their specificities, resources and criticalities. Secondly, to promote and trigger their reactivation through small ground actions co-designed and co-produced with local communities. In a continuous exchange among partner cities to share methods, criticalities, opportunities and lessons learnt. With the aim of offering local administrations and stakeholders a solid, documented and field-tested contribution to the possible launch of policies and plans for the enhancement of these water landscapes.