Background: Rural geomorphoturism is a type of consciously and sensibly rural tourism in environment with the aim of watching and recognizing the geological phenomena and their processes and learning how to shape and evolve them in and around the countryside, Which if ignored by ethical standards by tourists, can lead to problems and vulnerabilities in villages. Therefore, the current research has been carried out to determine the geomorphosites of Semnan province based on the ethical codes of tourism and Ranking of studied villages based on vulnerability.
Method: The present study is descriptive-analytical. The statistical population consisted non-native tourists in four of the rural geomorphosites of Semnan province (Rashem, Pade, Lasagerd, and Moaaleman) that among them, 170 were selected randomly as a sample. A questionnaire was used to collect data. Data analysis was done in two sections: descriptive statistics and COPRAS' technique by using SPSS software.
Results: The results of the study showed that the Moaaleman village had the least vulnerability in terms of sustainable development of rural geomorphotourism with an emphasis on ethical tourism codes and the Lasgerj village is the most vulnerable village. The components of mutual understanding and mutual respect between the tourist and the host, and respect for each other's values and traditions, and consideration of ethical components, have a higher weight than the other components.
Conclusion: Based on the findings of the research, in order to increase the desirability of the ethical actions of tourists in rural tourism areas as well as to increase the conscious environmental and ethical behaviors in relation to the natural environment and human environments of geomorphosites, a set of behaviors can be considered as a guide for engaging tourists with rural geomorphotourism sites originally established in the province of Semnan in a pilot, then for the whole country.