Avani is known for the Sita temple situated on a hill. This temple is one of the few temples dedicated to Sitadevi in India. There is a belief that the sage Valmiki, the author of the epic Ramayana, was residing here during the period of Ramayana. Sitadevi lived here in his ashram while in exile. Sitadevi gave birth to her twin children Lava-Kusha here. Even today the room where Sita gave birth to her children exists. The war between Sri Rama and his sons Lava and Kusha happened in this village.
This hill also has the temple of 'Hari Shresta Adi Jambava', Jambava is Attributed to Agra Archana During Famous Ramalingeshwara Fest, which is celebrated every year. He gave Shyamanthak jewel to Lord Krishna. On the same occasion Lord Krishna marrids Jambavatithe daughter of Adi Jambav. Jambava along with his army constructed Ramsethu. Jambavan is also been associated with Jamthun village in Ratlam tahsil of Madhya Pradesh and Jambuvan Cave of Ranavav Taluk of Porbandar, Gujarat state.
Avani is also known as the Gaya of the south and has ancient temples known as the Ramalingeshwara, Lakshmaneshwara, Bharateshwara and Shatrugneshwara, dating back to the period of the Nolamba Dynasty.
When Sri Narasimha Bharati IV of the Sringeri Sharada Peetham was on his sancharas, he camped here for a few days. During his stay here, in Avani, he found an idol of Goddess Sharada, in standing posture flanked by Srimajjagadguru Adi Shankaracharya and the Sri Chakra. He consecrated this idol here and established a new Matha and installed one of his shisyas as the head of the new Matha. This matha is now known as Avani Sringeri Jagadguru Shankaracharya Sharada Peetham. There is a branch of this matha in Basaweshwaranagar in Bangalore.