Agasthiyar Falls is located in Western Ghats to the South of Papanasam town and to the north of Papanasam Lower, the first lake in the descent of Tamiraparani River. It is located from the nearest city Tirunelveli. The waters from the falls meanders the stream in the river to Papansam hydro electric project and reaches the catchment area to the Papanasam Dam, which has a storage capacity of . The place is frequented by animals like Tiger and Panther, which are frequently spotted in the route from Agasthiyar Falls to Papansam as both are located close to Kalakkad Mundanthurai Tiger Reserve. The falls receives its waters during the South-west monsoon from May to September, but the maximum amount of rainfall is received during the North-east monsoon during October to December.But the falls is commonly said by the nearby locales as 365 days falls as people can go there any day because the water is from the dam hence the water flow will not be affected by the monsoon to a large extent. There is a small temple of Agasthiyar near the falls, where devotees worship after taking a holy dip in the falls.