Idukki: This is Asia's first arch dam, constructed across the Kuravan and Kurathi hills. The reservoir is surrounded by two dams, the Idukki dam and the Cheruthoni dam. You are allowed to walk on the Cheruthoni barrage to which the entry ticket is ~30 INR. The panoramic view from the Cheruthoni barrage is stunning. The view of the reservoir from the Hill View Park is extremely serene and peaceful.