Papahānaumokuākea Marine National Monument
The Papahānaumokuākea Marine National Monument (pronounced [ˈpɐpəˈhaːnɐwˈmokuwaːˈkɛjə]; PMNM) is a U.S. national monument listed as a World Heritage Site. It covers 582,578 square miles (1.5 million km²) of ocean water, including ten islands and atolls in the Northwestern Hawaiian Islands.