Kasi Viswanathar Temple is located at in the neighborhood of the Mahamaham tank in the holy town of Kumbakonam. As the name suggests this Shiva temple has the prime deity as Kasi Viswanathar accompanied with Lord's consort Visalakshi. The temple architecture is praise worthy and showcases the ancient style of South Indian style of construction and design.
The prime feature and attraction of this temple is the confabulation of nine holy rivers known as the Navakanniyar, namely Ganga, Yamuna, Saraswati, Narmada, Kaveri, Krishna, Godavari, Tungabhatra and Sarayu. The southern part of the temple houses a stala lingam, which were worshipped by Ravana. It is believed that this lingam grows with ages.