The Thenmala Dam is considered to be one of the longest reservoirs and popular picnic spots in Kerala. This dam was constructed under the Kallada Irrigation and Tree Crop Development Project. It has been built near the confluence of Chenduruney, Kazhuthurutty and Kulathupuzha rivers. The confluence forms a lake which is around 26 sq km in area. Boating can be enjoyed in the nearby reservoir.