Indira Gandhi Wildlife Sanctuary and National Park is a protected area located in the Anaimalai Hills of Pollachi, Valparai and Udumalpet taluks of Coimbatore District and Tirupur District; it is the largest and well preserved sanctuary in Tamil Nadu, lies in the Western Ghats south of the Palghat Gap, better known as Anaimalai (Mountain of Elephants). With an area of 958 Square Kilometer, it is rich in flora and fauna. This protected area constitutes the most important watershed for the agricultural economy and power supply. Major reservoirs like Parambikulam, Aliyar, Thirumurthi, Upper Aliyar, Kadambarai, Sholayar and Amaravathi are fed by the perennial rivers which originate from the Sanctuary. The tribal communities living in the sanctuary are Kadar, Malasar, Malai Malasar, Muduvar, Pulayar and Eravalar. They participate in the management as Forest watchers and Antipoaching Watchers. The Sanctuary is highly diverse in its topography, altitude, rainfall, climate and temperature. Therefore, it naturally supports a wide variety of flora and fauna including several rare, endemic and endangered species of plants and animals. Diversity of landscape and its components enchants one and all alike be he a tourist, a trekker, an anthropologist, a wildlifer or a naturalist. Moderate warm climate almost through the year makes it attractive destination throughout the year but the best time to visit would be December to April.