Papahānaumokuākea Marine National Monument

The Papahānaumokuākea Marine National Monument is a U.S. national monument listed as a World Heritage Site, encompassing 582,578 square miles of ocean waters, including ten islands and atolls of the Northwestern Hawaiian Islands. It was first created by President George W. Bush in 2006 with an initial 140,000 square miles (360,000 km2). President Barack Obama expanded the Monument in 2016, increasing its area more than fourfold by moving its border to the limit of the exclusive economic zone, ma