3. Bay of Plenty, New Zealand

Bay of Plenty occupies about 15,281 square kilometers, which is located from the Coromandel peninsula in western New Zealand to Cape Runaway in the east. White beach, natural harbors and attractive diving sport fascinate tourists. However, the increasing global warming will exacerbate erosion and flooding, threatening the local tourism and putting the coastal population at risk.

Bay of Plenty, New Zealand [huanqiu.com]