Joysagar Tank and Temples : The 318 acre watery expanse of Joysagar, 5 km off the Sivasagar town, is the country’s biggest tank and it enlivens the noble sacrifice of Sati Joymati for saving her Joydoul husband from the royal wrath. The tank was built by king Rudra Singha in memory of his mother Joymati in 1697. On its banks 3 temples were built in 1698 by the same monarch. These are the Joydoul (Vishnu Temple), the Sivadoul and the Devidoul which highly revered.