Agaya Gangai (Tamil: ஆகாய கங்கை) waterfalls are located in Kolli Hills of the Eastern Ghats. Panchanathi, a jungle stream, cascades down as the Agaya Gangai (En:Ganges of Sky), near the Arapaleeswarar temple atop the Kolli Hills in Namakkal district, Tamil Nadu. It is a 300 feet (91 m) waterfall of the river Aiyaru situated close to Arapaleeswarar temple. It is located in a valley that is surrounded by mountains on all sides.
The caves of Korakka Siddhar and Kalaanginatha Siddhar are situated near the Agaya Gangai waterfalls inside the forest area.