In Kerala, one of the major attractions lies in Nilgiri Hills, Palakkad. Silent Valley National Park is located in Palakkad district, Kerala. Robert Wright first explored by tracing this natural park in Nilgiri Hills way back to 1847. Out of over 100 large and small parks in India, Silent Valley National Park is the largest park with wonderful natural aesthete. The wildlife of this biggest park is adventurous to people. Rare animals like tiger and macaques are preserved in this national park in Kerala. However, recently, the environmental issues create lot of problems to rescue the endangered animals living in this national park. The hydro electricity project has been launched to generate more electricity to illuminate the vast area. However, this hydro electricity project threatens up these rare animals. The nearby water reservoir or dam releases huge volume of water to drench 8.3 km green forest. It is dangerous to keep the balance of ecology saving wild animals and endangered birds. For this reason, the government of India has taken quick initiatives to save this national park. Eventually, the former Prime Minister Indira Gandhi decided to cancel the project for the sake of development of this vast area. The national park was saved from the disaster. Since then, Palakkad tourism grew into maturity without obstruction. People visit this beautiful national park to meet different birds, animals and endangered plants. e Kuntipuzha River floods 15 km area of the park dividing this tourist spot into two halves. The Silent Valley in Kerala is wrapped up with the shroud of mystery. During monsoon season, at higher altitude, rainfall is severe however it decreases slowly when cloud starts moving from west to east. So the effect of rainfall also affects Silent Valley National Park in Kerala. The beautiful scenario of this national park attracts tourists coming from abroad.