New Zealand-Waikato River
The Waikato River is the longest river in New Zealand, running for 425 kilometres through the North Island. It rises in the eastern slopes of Mount Ruapehu, joining the Tongariro River system and emptying into Lake Taupo, New Zealand's largest lake. It drains Taupo at the lake's northeastern edge, creates the Huka Falls, and then flows northwest, through the Waikato Plains. It empties into the Tasman Sea south of Auckland, at Port Waikato.