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New Zealand has 15,134 km (9,398 mi) of coastline and extensive marine resources. The country claims the fifth-largest Exclusive Economic Zone in the world, covering over four million square kilometres (1.5 million sq mi), more than 15 times its land area.[1] It has no land borders.
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The North Island is less mountainous than the South, and is marked by volcanism. The island's tallest mountain, Mount Ruapehu (2797 m / 9176 ft), is an active cone volcano. Lake Taupo is near the centre of the North Island and is the largest lake by surface area in the country. It lies in a caldera created by the Oruanui eruption, the largest eruption in the world in the past 70,000 years