From physical megastructures to geoengineering experiments, from protocols underlying digital networks to natural resources powering the machines and gadgets in our daily lives, infrastructures are omnipresent and yet difficult to map. They entail different realities that are stacked on top of each other in ways that are inextricable. The seminar, offered as a collaboration between FB05, FB06, and the Kunsthochschule, will explore how infrastructures organize, structure, and construct geographic and urban space. Together, we will think about such questions as: What is the difference between social, physical, geographic, and environmental space? How is space constructed by infrastructures? What is the environmental role of geoengineering, and how is one to live in its aftermath? How do art and architecture become spatial infrastructure?