Also known as Rat Tail Falls, Thalaiyar Falls is located in the lush green slopes of Palani Hill ranges in the Dindigul District, in Kodaikanal. With a height of 297m, it is the highest waterfall in Tamil Nadu, sixth highest waterfall in India and the 267th highest in the world. There is a view tower in the park at the Dum Dum Rock, from where you can get a beautiful view of the falls and the Manjalar Dam. The river water coming to the falls is from Perumal Malai village, through a 9 km downstream and is said to be clear.