To the South of Kalyana Mandapam the Elephant tank is situated. Even now it is called the Elephant tank since it is so big that it can accommodate elephants. 

Steps are provided in the Southwest corner of the tank so that elephants could climb down and get out easily, say historians. 
The tank measures 58 meters long, 40 meters wide and 15 meters deep. On the four sides of the tank, a cloister mandapa with 134 stone pillars has been constructed. 

Some historians hold the view that this tank would have been used as a swimming pool by kings, royal family, relatives of kings and generals.