|Thenmala is the first planned eco-tourism destination in India. The Thenmala Dam is a popular ecotourism destination in Kerala. The Dam, which impounds the largest reservoir in the state which was built under the Kallada Irrigation and Tree Crop development project. The construction of the Parappar Dam across the confluence of the Chenduruney, Kazhuthurutty and Kulathupuzha rivers has resulted in the creation of a beautiful artificial lake of about 26 Sq. Km. which spreads along the middle of the Chenduruny Wildlife sanctuary. It is the second largest irrigation project in Kerala.