Ecotourism aims to achieve sustainability by conserving the environment and improving livelihoods of local communities. It is defined as responsible travel to natural areas that minimizes negative impacts and provides economic benefits to conservation and local people. However, conventional mass tourism often leads to overdevelopment, social/environmental issues, and few local economic benefits. Ecotourism must respect local culture, empower communities, and generate profits for sustainable development to achieve its principles, addressing complex challenges along the way. Small-scale, community-involved models following best practices and certification standards can help ecotourism achieve sustainability.