The Holy Theerthams inside the Ramanathswamy Temple are detailed as below:
| Theertham | Location | Importance |
| Mahalakshmi Theertham | South of the Hanuman Temple | Dharmarajan (Eldest of Pandavas) bathed here and became rich. |
| Savithri Theertham | West of the Hanuman Temple | Sage Kasibar (Kashyap Rishi is also known as Kasibar in Tamil Literatures) got rid of his curse. He was a Shiva Devotee. There is a temple in Tirunelveli District called Kasibarnathar Temple on his name. |
| Gayathri Theertham | ||
| Saraswathi Theertham | ||
| Sethu Madhava Theertham | The Tank at the third corridor | One will get Lakshmi\’s blessings and purification of heart |
| Gandhamadana Theertham | In the area of the Sethumadhava Temple | One will get riches and their sins will be absolved after getting rid of their penury. |
| Kavatcha Theertham | One will not go to hell | |
| Gavaya Theertham | Shelter under Karpaga Virutchaga Tree (A tree that is supposed fulfil all wishes) | |
| Nala Theertham | One will get Soorya Thejas and reach Heaven. | |
| Neela Theertham | One will get the benefit of Samastha (entire) yaga and receive Agni Yoga. | |
| Sanku Theertham | In the inner corridor of the Temple | Vathsanaba, the Sage, got rid of his sin of ingratitude |
| Sakkara Theertham | The Sun got His hand turned golden | |
| Brahmahathi Vimochana Theertham | Brahamahathi doshas (sins of killing Brahmins) are absolved. | |
| Sooriya Theertham | One will get the knowledge of the past present and the future and reach the worlds they want. | |
| Chandra Theertham | ||
| Ganga Theertham | Gananasuruthi Rajah attained wisdom | |
| Yamuna Theertham | ||
| Gaya Theertham | ||
| Siva Theertham | South of Nandi Deva in the Temple | Completion of Bhaira Brahmahathi |
| Sadyamirtha Theertham | In the Amman Sannathi | Emperor Bururoonu got rid of his curse |
| Sarva Theertham | In front of Lord Ramanatha\’s sannathi. | Sutharishna got rid of his blindness (from birth), illness and old age and then he prospered. |
| Kodi Theertham | In the first corridor of the Temple | Sri Krishna got rid of his Sin of killing his Uncle, Kamsan |
Very informative. Thanks for the details.