Adventure Spot/Engineering Marvel: This location is famous for a 5.5-km long, man-made circular tunnel that diverts water from the Erattayar Dam to the Idukki Reservoir. The tunnel exit creates a spectacular seasonal waterfall and gives a panoramic view of the reservoir’s catchment area. The name “Anchuruli” means “five vessels,” referring to five hills visible when the water level is low. It’s a popular spot for trekking and photography.