Agnithertham is located about 100 meters towards the east of the main entrance of the Ramanathswamy temple, There are about 22 wells in Agnitheertham. The water of all the 22 wells has different taste.
According to a legend, Lord Rama bathed in this part of the sea after killing the Lanka king Ravana. The water in Agnitheertham is considered to be sacred and many pilgrims perform pooja at this seashore for honouring their ancestors. Devotees across the globe take a holy dip in the Agnitheertham for washing away their sins.