The tourism, as a phenomenon of local to global impact, and complex activity with complex effects, from the economic to the social ones and, not least with influence on the environment, determined a new way of cohabitation between the natural and anthropic and anthropogenic environment through tourism. Its bipolar character -phenomenon and business – has given it a particular position among other categories of activities, such as generating flows of tourism product consumers, from the area of origin, or the tourist market, to the tourist’s destination area, including touristic attractions belonging to the natural and man-made environment, or primary touristic offers, which includes the tourism infrastructure with different size and complexity. This study attempts to capture the complexity and extent of this phenomenon, with multiple effects, having a spatially and temporally complex and phasing evolution, summarized in five stages, starting from the phase of pre-tourism to the one of maximum and complex development, until the saturation and decline phase, with the possibility of a new cycle re-enactment.