The temple is dedicated to Maha Vishnu surrounded by beautiful hills and forests, is located 32 km away from Mananthavady. The temple is also known as Sahyamala Kshetram and Kashi of South.
The rituals at Thirnelli temple are performed on the banks of stream Papanashini, which originates from the Brahmagiri hills. The stream is considered to have medicinal powers.