Waitangi is not a city, but a significant historical site in New Zealand. Waitangi is located in the Bay of Islands in the Northland Region of New Zealand. Waitangi is known as the place where the Treaty of Waitangi, the founding document of New Zealand, was signed between the Māori chiefs and the British Crown in 1840. The Waitangi Treaty Grounds is now a popular tourist destination and a place of national significance.