Based on the research activity within the ISLE International Sustainability Network, this paper represents a step forward aiming to find some contacts points in the experiences some international cases (USA, Brazil, Italy and France) have grown in the development of agritourism in mountain contexts. Despite the singular differences and the national specificities, agritourism is generally considered a particular form of social innovation in agriculture and rural development of mountainous areas, aiming at recomposing the natural and the human dimensions within the framework of a new sustainable way of doing agriculture. At the basis of the research is the hypothesis that agritourism operations are slowly and gradually shifting towards a new perspective/model. Some years ago, agritourism was traditionally viewed as a way for farmers to integrate or diversify their incomes. Nowadays instead—as the diversity of practice has grown and new values have emerged—the range of farmers’ motivations has become much broader. Some of these motivations include not only economic issues but also social, environmental and cultural ones, while addressing a more comprehensive idea of community-based and sustainable development. Case studies from South Carolina (USA), from Italian mountain regions, from Santa Catarina State in Brazil and from France are illustrated in which different innovation perspectives are highlighted.