Papahānaumokuākea Marine National Monument is the single largest conservation area in America, and one of the world’s largest marine conservation areas. It encompasses 139,797 square miles of the Pacific Ocean, and it was established in 2006 by Presidential proclamation. Part of the monument is the U.S. Fish and Wildlife Midway Atoll National Wildlife Refuge. Three million seabirds representing 21 species live on these islands. It was here that Hawaii received the largest recorded wave of the tsunami.