Introduction to Rangitoto Island: Rangitoto Island (Rangitoto) is located in Auckland, New Zealand. It was formed by a series of volcanic eruptions about 600 years ago. It is Auckland's most significant geographical feature - a wide, triangular jagged basalt volcanic rock that houses the world's largest Christmas tree, lava caves, strangely shaped rocks, etc. Visitors can also take a train or walk to the 260-meter-high peak to look around at the Hauraki Gulf and Auckland city.