The Athirappilly Waterfall, at 24-m high, is the largest in Kerala often called &lsquothe Niagara of India&rsquo by tourist guides. At the same time, the Athirappilly Waterfalls are more than a mere picnic spot. Surrounded by forests that are home to all kinds of wild animals, including elephants, leopards and bisons, this area is also known to birders as the only place where all four south Indian hornbills can be spotted &ndash the Grey Hornbill, the Malabar Pied Hornbill, the Malabar Grey Hornbill and the Great Indian Hornbill.