National Park with a wonderful name "the silent valley" is located in the Blue Mountains (Nilgiri hills), located in the state of Kerala in South India.

There are several theories about where the name of the area. According to one, she was called "quiet" because there's not hear the usual for this area of singing cicadas. And according to another theory, the name appeared due to the fact that the valley it inhabits a special kind of macaques – the wander (lat. macaca silenus, and "silent" means "quiet, silence").

The first scholar who drew his attention to this place, became in 1847 the British botanist Robert Weight. Thanks to him, already in 1914, this valley has acquired the status of protected territories, which, however, did not prevent the authorities in 1928 flowing through this area the river Kunthipuzha to install a small hydroelectric power plant.

Today it is a unique place with an area of more cu km, which is completely covered by tropical and evergreen forests, has become the habitat of many mammals, birds and reptiles. Among the most common types can be identified linkworth macaques (above the wonder), which are practically an extinct species. Because of this Primate species that are on the verge of extinction, and was formally established in 1980, the Park, and in 1983 the Prime Minister of India Indira Gandhi awarded him the national status.

Since 2001, around the Park engaged in a bitter dispute, as some government officials want to engage in the development and expansion of the existing Park power station. What at odds with conservationists and environmentalists, arguing that such interference in the ecosystem of the valley would entail irreversible changes and will lead to the death of the Wonderland and other inhabitants of the Park.

However, in 2007 a project for the construction of the dam was approved.