Waste is never completely or permanently “out of sight.” Once discarded, it undergoes transformations, often reappearing elsewhere in new forms. It can become a problem or a resource; it may be suppressed or remembered. In this volume of RCC Perspectives, scholars from different disciplines—from history and art history, urban geography, environmental studies, and anthropology—investigate the traces waste leaves behind in the course of its travels. The essays follow the journeys of unwanted substances and unusable objects by studying how they have transformed landscapes, ecosystems, and even the human body.