"Idukki" meaning constriction, is the word from which Idukki district asumes its name. The gorge between two high and massive hills known as "Kuravan Mala" and "Kurathi Mala"  in the district through which the river Periyar, one of the largest rivers of the state flowed, is the one under reference.   Here a Double curvature arch dam, 550 feet high and 65 feet thick,has been constructed, making it one of the biggest of its kind in the world.
Idukki is becoming a mainstream for the development of Idukki district in the field of tourism. Idukki Taluk Tourism Development Co-operative Society (ITTCOS) is working to increase the tourism potential and to formulate and implement various schemes required for tourism development.