This article makes brief reference to the background of the “One Health” concept in the global and Peruvian context, and to the way in which this holistic health perspective served as the foundation for the creation of the Center for Technological, Biomedical, and Environmental Research (CITBM) at Universidad Nacional Mayor de San Marcos. Additionally, it describes the InterACTION Labs project, one of the experiences using the “One Health” approach, led by CITBM, the University of Washington, and Traction, an NGO focused on design and research in health and ecology topics. InterACTION Labs is a design and transdisciplinary action-research (TDAR) program developed in “Claverito,” a floating community in the city of Iquitos in the Peruvian Amazon, based on the hypothesis that the built environment is a health determinant for both humans and other species (birds, reptiles, plants, etc.). It also discusses the concept of ‘built environment’ as related to the theory and practice of public health, landscape architecture, epidemiology, and other health and environmental fields. Finally, it reflects on the achievements and challenges of the project that began in 2015, and describes the work plan for the coming years, with a proposal to extend the program and use the “One Health” approach to promote human, ecological, and environmental health in Peru and other parts of the world. © 2018, Instituto Nacional de Salud. All rights reserved.