Idukki Arch Dam: This is the world's second and Asia's first arch dam, constructed across the Kuravan and Kurathi hills. 550 ft. high and 650 ft. wide, the dam lies close to the Cheruthoni barrage. To its west is the Kulamavu Dam. 
Idukki Wildlife Sanctuary is located closeby. 

The Idukki Wildlife Sanctuary: This sanctuary extends over the Thodupuzha and Udumpanchola taluks of Idukki district, spreading over 77 sq. km and is about 450 - 748 m above sea level. The Idukki Reservoir formed by three dams - Cheruthoni, Idukki and Kulamavu - extends to 33 sq km. 

Animals: Elephant, bison, sambar deer, wild dog, jungle cat, tiger, wild boar etc. 

Snakes: Cobra, viper, krait and a number of non poisonous snakes. 

Birds: Jungle fowl, myna, laughing thrush, black bulbul, peafowl, woodpecker, kingfisher etc.