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Silent Valley National Park
Silent Valley National Park is a protected tropical evergreen rainforest in Palakkad District, Kerala, with entry at Mukkali near Mannarkkad. Part of the Nilgiri Biosphere Reserve and Western Ghats World Heritage Site, it covers about 89.52 sq km. Notable for its undisturbed primary forest, endemic biodiversity including lion-tailed macaque, and its conservation history linked to the Save Silent Valley Movement.