This lecture discusses the preservation of urban green spaces in Lausanne, focusing on the threat faced by the Cedars countryside due to real estate pressure. It explores the potential loss of heritage, public spaces, biodiversity, and views over the lake. The lecture proposes a counter-project for a more vibrant and integrated living experience, emphasizing cohabitation with different species and a connection to the lake. It also delves into the history and significance of key locations like the Milan Park and Beauregard countryside, highlighting the importance of green areas in urban environments.