Designers acknowledge that their skills can assist the visualization and materialization of a desirable future and have gone as far as proposing that design can achieve societal change. Designing for a better world is associated with decreasing environmental depletion impacts while making good for both people and the environment, if possible. Evidently, this is a space where design deals with ethical matters, defining what is good or questioning if good has a universal meaning. This paper discusses the case of Aalto (...) LAB Mexico's Eco-hostel project, a practical and ethical design exploration. It shares the impressions of the design team when co-designing with the Mayan community of ‘20 de Noviembre’, located in Calakmul, Campeche, México. The Eco-hostel project was proposed as an element which can play a central role in achieving betterment of several aspects of the community's daily life. Several of those aspects were communicated by the inhabitants of 20 Nov, and some others were ident.. (shrink)