Thriunelli temple has a unique mythological significance. This temple of Lord Vishnu is said to have been created by Lord Brahma after he was drawn to the adjacent hills of Brahmagiri. It is believed that Lord Brahma found an idol on an Indian Gooseberry (Amla) tree and inferred it as the statue of Lord Vishnu, thus constructing this temple for him with the help of other Indian gods. Indian Gooseberry is called Nelli in Malayalam and therefore the name Thirunelli was given to the temple. It is also known as the ‘Kashi of South’ and is located at a distance of nearly 35 kilometres from Mananthavady.