The goal of this studio is to discover tools for a sustainable planning of urban open space, based on ecology and on slow life. The studio takes Seoul as object. It starts with an investigation into landscape identity. We analyze maps of geomorphology and define a pattern for the landscape. This pattern is basically a system defined by mountains and rivers: the river Han and its watershed with rivers and canals, river terraces, fluvio-marine plains, alluvial valleys, alluvial terraces and fans, rolling hills, and surrounding mountains. Occupation patterns following or negating the landscape are discovered. We will find out how this landscape system is readable in the modern city.