Athirapilly Falls, is situated in Athirapilly Panchayat in Chalakudy Taluk of Thrissur District in Kerala, India on the Chalakudy River, which originates from the upper reaches of the Western Ghats at the entrance to the Sholayar ranges. It is the largest waterfall in Kerala, which stands tall at 81.5 feet. Just a short drive from Athirapilly to the Vazhachal falls, which is close to dense green forests that are home to many endangered and endemic species of flora and fauna. There is another waterfall on the way from Athirapilly to Vazhachal Falls, in close proximity to the road, which is locally called "Charpa Falls". Athirappilly Falls is the largest waterfall in Kerala and is nicknamed "The Niagara of South India". Controversy about a state-proposed hydroelectric dam on the Chalakudy River above the waterfalls began in the 1990s and continued through 2017. River The long Chalakudy River, originates in the Anaimalai mountains of the Western Ghats and flows through the Vazhachal Forest toward the Arabian Sea. The river starts off smooth but becomes more turbulent as it nears Athirapilly. At Athirappilly Falls, the water surges around big rocks and cascades down in three separate plumes. Below the falls, the river remains turbulent for about until it reaches Kannamkuzhi, from where it calms and flows smooth until reaching the dam at Thumpoormuzhi. Wildlife Forest wildlife in the area includes the Indian elephant, Bengal tiger, Indian leopard, gaur, sambar, and lion-tailed macaque. The unique elevation riparian forest in the Athirappilly-Vazhachal area is the only location where all four South Indian species of hornbills — the great hornbill (the state bird of Kerala), Malabar pied hornbill, Malabar grey hornbill, and the Indian grey hornbill are found living together. Plantations in the area contain teak, bamboo, and eucalyptus. Environmentalists claim that Athirappilly is a one-of its-kind riparian ecosystem in Kerala. V.S. Vijayan, Chairman of the Kerala State Biodiversity Board and former Director of the Salim Ali Centre for Ornithology and Natural History (SACON), Coimbatore, has been quoted in Down to Earth magazine as affirming that the Vazhachal forest division is the second most biodiverse area in the State. The International Bird Association has declared it an ‘Important Bird Area' and the Asian Nature Conservation Foundation has recommended that the area should be declared a sanctuary or a national park, he points out. The Wildlife Trust of India says it represents one of India's best elephant