Taman Negara National Park, Malaysia (TNNP) is widely known for its famous ecotourism destination  in Malaysia. Many developments have taken place over the last decades. However uncontrolled development  has caused serious environmental damages in the area and concerns visitors. The paper is designed for relevant  stakeholders and TNNP management in order to refine their policy inputs to improve tourist perception of TNNP  in accordance with the 2030 Agenda. The main objectives of the study are to explore visitor’s perception on  environmental issues in TNNP, the main issue and how it affects their number of tourist revisit. Three methods  employed in the study are surveys, interviews and document analysis. The study received favourable feedback and  valuable input from respondents. Contamination of Kuala Tahan River was identified as the main environmental  issue in TNNP. As a result, majority of visitors will not revisit TNNP if environmental issues in the area remain  unsolved