This book chronicles the collaborative design and realization of the Río Sumpul Massacre Memorial in Las Aradas, El Salvador. On May 14, 1980, three hundred people were brutally murdered by paramilitary units on the Río Sumpul, a river on the country's border with Honduras. Trails and Voices is a memorial and a homage to the resilience of those who were impacted by the massacre, a momentous event in the early years of the civil war. The book allows us to hear the voices of survivors, members of the local community, people involved, architects, artists, and scholars. Following multiple trails, it explores how Asociación Sumpul worked as part of an international team to make the memorial a reality-within the framework established by the international initiative Surviving Memory in Postwar El Salvador.Harold Fallon is a partner at AgwA architecture office and a professor at KU Leuven Faculty of Architecture. Evelia Macal is a Salvadoran architect, urban planner, and ceramist, living and working in Belgium. Lourdes Calero is a ceramist and professor at Escuela de Arte, Universidad de El Salvador (UES). Amanda Grzyb is a professor at Western University and director of the Surviving Memory in Postwar El Salvador project. Thomas Montulet is a freelance collaborator at AgwA architecture office and a PhD student at UCLouvain Faculty of Architecture.