Heritage tourism has gained increasing scholarly attention by integrating cultural, historical, and environmental aspects into tourism design. This study employs bibliometric analysis to examine trends, gaps, and future directions in heritage tourism research, focusing on global outputs from 1981 to 2024. Using Scopus data, 409 documents were analyzed based on document type, geographical distribution, keyword co-occurrence, and citation metrics. Results indicate that the United States, China, and European countries are the largest contributors, with “sustainability,” “cultural heritage,” and “landscape architecture” emerging as key terms. The findings highlight trends in sustainable tourism development, ecotourism, and the conservation of cultural landscapes. Advanced technologies like Geographic Information Systems and Augmented Reality are increasingly applied to enhance heritage site management and visitor experiences. Despite these advancements, significant gaps persist, particularly in bibliometric approaches and comprehensive studies from methodological and geographical perspectives. Future research should explore interdisciplinary collaborations, vernacular architecture, and sustainable strategies to balance cultural preservation, environmental stewardship, and economic growth. This study offers valuable insights for academics, planners, and policymakers to develop informed strategies for sustainable heritage tourism within the field of landscape architecture.