Throughout the past decades of research on ecotourism, a number of studies have examined management tools, business issues and ecological impacts from an environmentalist point of view. In this study, the writer attempts to determine the culturally educative values of ecotourism from a tourist’s point of view. By taking a local ecotour to Smangus as a case study, the writer conducted a qualitative study by observing the destination, interviewing the habitants, and talking with the operators. The writer first evaluates the physical experience of tourism authenticity ecotourism provides. Then the writer addresses the impact of ecotourism on the development of “character, culture, and ecology”, the 3 C objectives advocated by Taiwan’s General Education Association. This is a case study exploring two sets of interactions. One of them is the mutuality between the tourists and nature. The other is the confluence of the tourists’ urban culture and the tour operators’ indigenous culture. The writer contends that once engaged with nature through an ecotour, any individual may gather inspirational information from the natural world and form an enlightened attitude towards the “beauty, diversity and integrity” pervading natural landscapes. However, tourists should understand that the culture and landscape of the ecotourism destinations are “dynamic” and evolve with the natural laws and civilization. Thus, tourists should not expect to encounter primitive authenticity in any ecotour spot.