This collection of essays reflects on the theme of "transition" in all of its nuances (from ecological to sustainable, describing the potential of fragile territories). This is a current issue on the political agenda and in the international scientific community, which interprets transition as a condition that calls for redesigning / rethinking spaces and flows (human and non-human) for a new relational ecology between bodies and inhabited contexts. Researchers, local administrators, architects, landscape architects, photographers are asked to think about landscapes in transition and their repercussions on urban planning and on the local and global territory. The contributions develop innovative reflections, especially in reference to the spaces of the urban fringe, abandoned and polluted areas, landscapes at natural and environmental risk. The transition in these spaces consists in the possibility of enhancing their ecological and environmental potential, favoring a transformation that affects society, settlements, and economies, with improvement in the living environments and the recycling of entire portions of the landscape. Hence, this book compares proposals and issues: the former, coming from the international perspectives of international projects; the latter, linked to local landscapes that must be preserved in the richness of their values in relation to history and biodiversity; landscapes that must be safeguarded if we are to improve the quality of life, designed as the producers of habitable space and beauty.