Silent Valley National Park is a national park in Kerala, India. It is located in the Nilgiri hills, has a core area of 89.52 km², which is surrounded by a buffer zone of 148 km². This national park has some rare species of flora and fauna. This area was explored in 1847 by the botanist Robert Wight. It is located in the border of Mannarkkad Taluk of Palakkad district, Nilambur Taluk of Malappuram district, Kerala, and Nilgiris district of Tamil Nadu. It is located in the rich biodiversity of Nilgiri Biosphere Reserve. Karimpuzha Wildlife Sanctuary, New Amarambalam Reserved Forest, and Nedumkayam Rainforest in Nilambur Taluk of Malappuram district, Attappadi Reserved Forest in Mannarkkad Taluk of Palakkad district, and Mukurthi National Park of Nilgiris district, are located around Silent Valley National Park. Mukurthi peak, the fifth-highest peak in South India, and Anginda peak are also located in its vicinity. Bhavani River, a tributary of Kaveri River, and Kunthipuzha River, a tributary of Bharathappuzha river, originate in the vicinity of Silent Valley. The Kadalundi River has also its origin in Silent Valley.
