#4 Phoenix Islands Protected Area, Republic of Kiribati - 157,626mi²
Resting halfway between Hawaii and Australia, the Phoenix Islands Protected Area is located in the Republic of Kiribati, an island nation in the central pacific. This nation is responsible for administering and protecting one of the most biologically important areas within the Polynesian/Micronesian hotspot which happens to be about the size of California. Although they have been criticized in the past for their allowance of commercial fishing, by January 2015 all commercial fishing had been officially halted by this oceanic nation.
#3 The Kavango Zambezi Transfrontier Conservation Area, Zambia, Botswana, Namibia, Zimbabwe, and Angola - 200,739mi²
This massive national park stretches across five African nations and includes major portions of some of the most important rivers in the southern region of Africa. Not only does the park contain some truly beautiful sights, such as Victoria Falls, but the array of wildlife species has made this national park a go-to for many safari adventure seekers, and an important source of income for the nations responsible for this unique region.
#2 Northeast Greenland National Park, Greenland - 375,291mi²
As the name might suggest, the Northeast Greenland National Park is located in northeastern Greenland. This national park is so big that if it were its own country it would be the 31st largest country in the world, sitting between Egypt and Tanzania. Despite its massive site, there are no permanent human settlements there, with temporary sites being used mostly during the summertime. Animals as diverse and beautiful as polar bears, walruses, musk oxen, and whales make this park an easy pick for polar adventure seekers.
#1 Papahānaumokuākea Marine National Monument, US, Hawaii - 583,014mi²
Stretching over half a million square miles, this beautiful stretch of the Pacific Ocean is considered a sacred place to the native Hawaiians. According to legend, it is the place where all life springs from and, quite honestly, we can see why. This massive national park supports over 7,000 different species, with new species being discovered all the time! Early this year, for instance, scientists made an important (although sadly unfortunate) discovery when they learned that a new species of seaweed had been killing large patches of coral.