This paper could be considered as a microhistory of El Penol town, since there was a research, about the elements that have left a mark in it, such as monuments, memories, papers and even, about some matters that seem to be unrelated to the main topic. Besides, some issues like the geography and the territorial contrasts were also appointed. In order to understand the purpose of this research, it is necessary to know the recent events in the region, which include the industrial boom of the capital city (Medellin) as well as of the Aburra Valley, sites that have been causing since 1926, everyone to place all of the expectations for electricity supply, in the Nare River basin. The hydroelectric project of the Empresas Publicas de Medellin (Colombia), consisted of many changes, not only physical, but also economic and social in the population of El Penol, nevertheless, its people have struggled and negotiated moving to a new municipal capital.