5. North Pole

North Pole  [huanqiu.com]

Possessing the world's most freshwater reservation of nearly 23.31 million square meters, the Arctic Ocean is surrounded by the land masses of Eurasia, North America, and Greenland, as well as many small islands. In the past ten year, the volume of melted ice in the North Pole has broken the records. Scientists worried that there would be no floating ice here till the summer in 2013.