Silent Valley was declared as National Park in 1984 and formally inaugurated in the year 1985. Initially there was only 89.52 sq.km. area under the Division which forms the core zone of the National Park. Research and Monitoring Silent Valley is one of the extensively researched National Parks in India. There is a vast amount of information available on the Park's biodiversity and ecology. Research activities are conducted within the National Park in order to fill the gaps in the knowledge and also to help management. Regular monitoring programs including Tiger, Elephant and Nilgiri Tahr population estimation is being conducted within the park on annual basis. A BRIEF LIST OF RESEARCH ... Silent Valley is a pristine natural sanctuary in the Nilgiri Hills of Kerala, India, with diverse ecosystems and endemic species. Learn about its history, wildlife, attractions, and conservation efforts in this comprehensive guide. Explore the wonders of Silent Valley National Park in 2024 with comprehensive information on timings, entry fees, exciting activities, and convenient travel tips.