Geotourism Potential for Sustainable Geotourism Development at Phou Pha Marn, Khammouane Province, Laos

Phou Pha Marn, located in Khammouane Province, Laos, is a karst landscape of notable geological and geomorphological interest. This study assesses its geotourism potential through the application of the Modified Geosite Assessment Model (M-GAM), integrating expert-based and visitor-oriented evaluation criteria. Five representative geosites, including Konglor Cave, Karst Tower Ridge, and the Nam Dene doline field, were assessed for their scientific, educational, aesthetic, and touristic values. The results indicate that Konglor Cave scored highest overall (0.75), with outstanding scientific and educational value, while Karst Tower Ridge demonstrated exceptional aesthetic appeal (0.90). Despite moderate infrastructure scores, the area exhibits high geoheritage potential due to its diverse karst features, cultural associations, and landscape integrity. Comparative insights from successful geotourism models in Albania, Serbia, Vietnam, and Malaysia further inform the development framework. The study concludes with strategic recommendations for sustainable geotourism planning, infrastructure enhancement, and community-based geoheritage conservation, positioning Phou Pha Marn as a strong candidate for future geotourism initiatives in Southeast Asia.