This book showcases nine possible scenarios for future cities, based on different aspects and characteristics of the term "proximity". Different points of view have been investigated on many themes related to the city of proximities: from bottom-up design actions to the inclusive city, from neighborhood services to public space in transformation, to platforms and economies of proximity. When discussing the concept of proximity, it is imperative to several aspects of building and inhabiting the city of fifteen minutes. The city and its neighborhoods are complex structures, made up of stratified levels of evolving systems, that encompass administrative and political aspects, urban spatial considerations, the dynamics of human interaction, and more. The necessity to re-appropriate the urban space leads all inhabitants to contemplate different aspects of their lives concerning proximity space, reflecting on how behavior, actions, and relationships can be improved and transformed to make our future more sustainable. This book envisions future scenarios that will make public space an active and functional place for the city, more inclusive, responding to the needs and desires of the different populations that inhabit it.