This book explores how multi-criteria analysis (MCA) methodologies can enhance sustainable tourism management in protected areas, with Samaria National Park in Crete as a primary case study. Topics include the global impact of tourism, the role of national parks in conservation, and how nature-based tourism (NBT) supports local economies. Through the Multi-Criteria Satisfaction Analysis (MUSA) method, it examines visitor satisfaction over time, including shifts due to the COVID-19 pandemic, and provides actionable strategies for balancing visitor needs with environmental conservation. Ideal for tourism professionals, environmental policymakers, and researchers in sustainable development, this book bridges theory and practical applications for lasting success in tourism and conservation.