Hiyas sa Dulong Katagalugan: Uncovering the Potentiality of Ecotourism Destinations in the Lens of the Local Community of Tagkawayan, Quezon Joan R. Acosta1, Rio Ferdinand G. Arnaldo1, Holly G. Fernando1, Allyssa Bernice R. Mosquera1, Aaron R. Pajo1, Jovelle N. Villamayor1, & Maria Concepcion A. Ang1 College of Tourism and Hospitality Management, University of Santo Tomas, España 1 Boulevard, Sampaloc, City of Manila 1015 Abstract Ecotourism is one of the major factors in promoting the development of local communities. The study explores the potential of ecotourism destinations through the lens of the local community of the municipality of Tagkawayan in Quezon Province. This study evaluates the impact of ecotourism on socio-cultural, environmental, and economic aspects. Utilizing a qualitative approach through focus group discussions, the research assesses the competitiveness of the Municipality by engaging locals from the mapped ecotourism destinations in Tagkawayan. The mode of analysis is connected with the Sustainable Development Goals (SDGs), specifically SDG numbers 8, 11, 14, 15, and 17. The narrative analysis and findings led to the conceptualization of The Sustainability Equilibrium Paradigm: A Guide to a Greener Future. The concept is designed to benefit the local community and its ecotourism destinations. The baseline of “Green Investment” can help identify sustainable management practices and measure the feasibility of promoting ecotourism while empowering the local community to adopt effective ecotourism management strategies for long-term tourism sustainability. Keywords: development, ecotourism destinations, local community, sustainability, sustainable development goals, sustainable management