This is one of the holiest Shiva Shrines and is the southernmost shrine out of the 12 lingams of outh India. This is near the Rameshwaram Sethu on the Pamban Island. This is the same place where Lord Rama is said to have performed sacrifice for Lord Shiva to seek salvation after having killed the Demon King Ramana. This is when Lord Rama sent Hanumana to bring an idol of Lord Shiva from Benaras but he did not come on time. So, Mother Sita made a lingam out of sand and this was known as the Ramalingam. This is the main idol in the Ramanathaswamy Temple. The Gandamadam or Hanumaneshwar idol is also inside one of the shrines and the Vishveshwar Linga which was brought down by Hanuman is also there. This lingam is worshipped even before the Ramalingam everyday. This temple is often compared with the Kashi or Benaras Vishveshwar Temple.