Hogenakkal main falls have an elevation of about 66 ft. River Kaveri is the main source of this falls. As the Kaveri flows through the dense medicinal forest of Western Ghats, the water from this fall has many medicinal properties. The carbonate rocks found near this falls are considered as the oldest one in the world. One can use the watchtower to see the full view of the falls and the Kaveri river. A motion sensor alarm had installed as a precaution, to prevent the tourist crossing the safety area of the Hogenakkal falls.