Much of northern New Zealand, including Auckland, and parts of the South Island would be almost wiped out by rising sea levels if all the world's ice melted, according to new mapping by National Geographic magazine.
New Zealand would be among many countries to lose vast amounts of their landscape if the polar ice caps melted, the nature publication said.
A huge swathe of eastern Europe, the entire eastern seaboard of the United States, Bangladesh and a large chunk of China would disappear.
Australia would gain a new inland sea in its centre, and would lose much of the narrow strip of the east coast where four out of five Australians live, reaching as far round as Melbourne and Adelaide.
A similar, but smaller, body of water would expand across the upper North Island, across Waikato and the Auckland region.
