Karnaphuli (Bengali: কর্ণফুলি Kôrnophuli; also spelt Karnafuli), the largest and most important river in Chittagong and the Chittagong Hill Tracts, is a 667-metre (2,188 ft) wide river in the south-eastern part of Bangladesh. Originating from the Lushai hills in Mizoram, India, it flows 270 kilometres (170 mi) southwest through Chittagong Hill Tracts and Chittagong into the Bay of Bengal. A large hydroelectric power plant using Karnaphuli river was built in the Kaptai region during the 1960s.