where are the nilgiri hills located?
Nilgiri Hills, mountainous region of Tamil Nadu state, southeastern India. The peaks of the Nilgiri rise abruptly from the surrounding plains to an elevation of about 6,000 to 8,000 feet (1,800 to 2,400 metres); one of them, Doda Betta (8,652 feet [2,637 metres]), is the highest point in Tamil Nadu.