Kasi Vishvanathar temple in Kumbakonam is situated close to the Mahamaham tank with the principal deity being Kasi Viswanathar and his consort Visalakshi or Parvati. What fascinates you in the temple is the stala lingam, which is believed to have been worshiped by Ram and Lakshman on their way to Lanka, and said to have acquired Rudraksham which helped them kill the demon king Ravana. The idol is believed to have been growing with ages.