Idukki Arch Dam, a hydroelectric project, is built across the Periyar River. The project comprises an underground power generator, 20 small and big dams, five rivers and some underground tunnels. It is situated between two mountains, the Kuravan and the Kurathi hills, and is considered Asia's first and the world's second arch dam. The dam is at a height of 550 ft and has a width of 650 ft. It lies close to the Cheruthoni Barrage. Tourists can also visit the nearby Kulamavu Dam and Idukki Wildlife Sanctuary.