Banatheertham Falls located inside the picturesque Karaiyar Dam in Thirunelveli district is a natural cascading waterfalls situated at Kalakad Mundanthurai Tiger Reserve. The medicinal property of the water is acclaimed and it is believed that the legendary sage Agasthiyar wandered here in search of rich herbs found in this forest. It is a great place to take herbal bath flowing from the healing waters of Agasthiyamala Biosphere Reserve. Banatheertham fall is perennial, with December and January being the peak season. Surrounded by dense forests, the waterfalls present a magnificent sight when viewed from the lake. The boat ride also offers a breathtaking view of the adjoining hills. This range is also known for its plant diversity. The Thamirabarani River meets the Karaiyar Dam at Banatheertham Falls. The waters of Thamirabarani River are believed to have traces of copper in it, thus giving the river its name.