While there are some really huge rivers in north India, such as Indus, Jhelum, Chenab and Beas, south India does not have perennial rivers or those with high volume of water all year long. Cauvery river is one such important river to both Karnataka and Tamil Nadu. Let’s take a tour of the river starting from its source at Tala Kaveri upto the point where it joins the sea — at two different places!