This study investigates how the Returned Peace Corps Volunteers developed their intercultural sensitivity through their subjective intercultural experiences during their Peace Corps tenure from phenomenological perspectives. Eight Returned Peace Corps Volunteers in the Athens community participated in personal interviews and took the Intercultural Development Inventory for assessing their worldview. The triangulation of both data addressed the demystification of the process of intercultural sensitivity development from different angles. The participants’ unique intercultural experiences, their reflection on those experiences, and the results of their psychometric assessment revealed six significant emergent categories of phenomena in their intercultural sensitivity development: the significant linkages between their cognitive emphasis on cultural differences and similarities, and their progression of worldview. Overall, this study explored the developmental process of the Returned Peace Corps Volunteers who bridged huge cultural differences. Their empirical narratives and findings from this study help in designing intercultural training for other Americans to transcend from ethnocentrism.