Pitcairn Islands Marine Reserve
Located in the middle of the South Pacific Ocean, the Pitcairn Islands are a British Overseas Territory and, as of August 2016, home to one of the world’s largest fully protected marine reserves. The Pitcairn Islands Marine Reserve, almost 3.5 times the size of the United Kingdom at about 830,000 square kilometres (320,465 square miles), serves as a habitat to at least 1,249 species of marine mammals, seabirds, and fish.