Region
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Kansas
1
Kenosha County
1
Kobuk Valley National Park (Alaska)
1
Korean Demilitarized Zone (Korea)
1
Kruger National Park
1
Lake County
1
Lake Roosevelt National Recreation Area
1
Lake Roosevelt National Recreation Area (Wash.)
1
Lassen Volcanic National Park
1
Lassen Volcanic National Park (Calif.)
1
Lava Beds National Monument
1
Lava Beds National Monument (Calif.)
1
Lewis and Clark National Historical Park (Or. and Wash.)
1
Los Angeles River
1
Los Angeles River (Calif.)
1
Madrean Archipelago
1
Maldives
1
Maryland
1
Michigan, Lake
1
Middle Atlantic States
1
Middle West
1
Minnesota
1
Missouri
1
Missouri River
1
Missouri River Watershed
1
Mount Rainier National Park
1
Mount Rainier National Park (Wash.)
1
Nez Perce National Historical Park
1
Noatak National Preserve (Alaska)
1
North Cascades National Park
1
North Cascades National Park (Wash.)
1
Oceania
1
Ohio
1
Olympic National Park
1
Olympic National Park (Wash.)
1
Oman
1
Ontario, Lake (N.Y. and Ont.)
1
Ouachita National Forest (Ark. and Okla.)
1
Ozark National Forest (Ark.)
1
Pacific Islands (Trust Territory)
1
Pacific Ocean
1
Pea Ridge National Military Park
1
Pea Ridge National Military Park (Ark.)
1
Phoenix
1
Piceance Creek Basin
1
Pima County
1
Polar regions
1
Puget Sound
1
Puget Sound (Wash.)
1
Qatar
1
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