This Sanctuary extends over an area of 321 sq.kms in the junction of the three states of Tamil Nadu, Karnataka and Kerala.

It is rich in wildlife, like Elephants, Gaur, Tiger, Panther, Spotted Deer, Barking Deer, Wild Boar, Porcupine etc., birds like-minivets, hornbill, fairy Blue Birds, Jungle Fowls etc., and reptiles like python, Monitor Lizards Flying Lizards etc.

The Mayor river and the life around it is an experience by itself. The Theppakadu elephant camp is popular tourist attraction.