The notion of “limits” has several conceptual problems (ecosystem complexity, lack of data, gaps in science or bias of the scientists, etc.). Limits are, above all, conceptual constructs. It is therefore questionable whether it is possible to identify the geographical boundaries or area limits of natural ecosystems, much less to assess an ecosystem’s growth limits. Things become more complicated when moving from limits to certain parameters or resources to carrying capacity limits for a whole area, as in the case of tourism carrying capacity. Limitations for critical ecological resources like water need to be defined while stress due to tourism, agriculture, industry, etc. need to be considered. To achieve the above task of carrying capacity analysis a significant mobilization of resources (scientific, technological, financial, etc.) is required.