Anjuruli lies within the catchment area of the Idukki dam, where forested slopes descend toward a wide reservoir basin. The defining feature is a long, circular tunnel carved through rock to channel water from the Erattayar dam. Its rounded entrance opens into a steady outflow that forms a compact but powerful waterfall before merging into a deep green pool below.

Inside the tunnel, the cylindrical rock walls appear layered and textured, shaped by constant water movement. The interior narrows into darkness, with water flowing steadily along its base. At the outlet, the circular opening frames the falling water, creating a stark contrast between shadowed rock and white turbulence. During stronger flow, the cascade spreads wider across the rock face, while in calmer periods the tunnel structure itself becomes more visually dominant.

The surrounding terrain opens into a reservoir landscape marked by curved shorelines and forested ridges. Elevated viewpoints reveal the water stretching into inlets bordered by dense tree cover. Access roads wind through thick greenery, and cyclists move along these narrow hill routes before reaching the water’s edge. Rocky embankments near the waterfall allow careful footing along the shallows, adding a sense of physical engagement with the terrain.

In quieter sections along the reservoir, the scenery is soothing. Tree-lined banks reflect in still water, and open clearings provide resting points overlooking the lake. The interplay between engineered tunnel, falling water and expansive reservoir framed by hills defines Anjuruli as a layered highland landscape defined by aqua blue waters and unique rock formations.