Dated back to 3000 years, the Thirunelli Temple is one of the most famous religious attractions in the town. The temple is dedicated to Lord Vishnu and his idol is placed in Chaturbhuja form inside the temple. It can be reached by crossing a bridge made over the Papanasini River and in the south of the temple, there is a pond called Panchateertha which is believed to be the meeting point of five rivers. The temple is surrounded by 30 granite columns and is regarded as the Kashi of South. The architecture of the temple showcases the traditional style of Kerala and is designed with tiled roofs and granite lamp-post at the entrance. Various fairs and festivals such as Shivratri, Navratri, Krishna Jayanti and Chuttuvilakku are celebrated in the temple premises with great zeal and zest.