Protected areas are the territorial units' most favorable for ecotourism. This is simply because of  the opportunities they offer for the kind of economic efficiency associated with the rational exploitation of their resources, optimizing the relationship between the natural landscape and human activities. Relief items, with potential for developing eco-touristic activities, are represented by a variety of forms - the most abandant are those with karst origins - in national parks such as Hasmas-Cheile Bicazului and Domogled-Valea Cernei. They are also representatives of how morphological resources can be exploited through tourism with low impact on the environment and with consistent contributions to conservation of natural heritage.