Arulmigu Balasubramanya Temple is an important temple in Periyakulam. Rajendra Chola is said to have constructed this nearly 2000 years ago. The local legend says that once king Rajendra Chola went hunting in Agamalai near the banks of the Varaha River. And there he saw a pig suckling its young ones. The king unknowingly killed the pig. Seeing the hunger of the young pigs, Lord Muruga fed the piglets. King Rajendra Chola saw this amazing sight, and constructed this temple in memory of this event. A visit to this temple is considered equal to making a trip to Kasi or Varanasi. Since Brahmatheertha runs in this river, it is believed that a bath in this river will cure any incurable disease.