Agasthiyar Falls is located close to Papanasam in Tirunelveli district in the South Indian state of Tamil Nadu. The falls is located on the Western Ghats and to the south of Papanasam lower, the lake from where Tamiraparani River originates. It is located 42 km (26 mi) from the nearest city Tirunelveli. As per Hindu legend, it is the place where sage Agasthya got a view of Shiva in his marriage costume.

Papanasam also spelt as Pavanasam is a famous picnic spot in Tirunelveli district in the Indian state of Tamil Nadu. It falls under the Ambasamudram Taluk. It is situated 60 kilometres (37 mi) from Tirunelveli. The site features tourist attractions like Thamirabarani River, Agasthiyar Falls, Siva Temple, and Papanasam dam and hydroelectric power plant.