U.S. Department of the Interior:
Carrizo Plain National Monument
U.S. Department of the Interior:
Ash Meadows National Wildlife Refuge
U.S. Department of the Interior:
Devils Tower National Monument
U.S. Department of the Interior:
Gates of the Arctic National Park & Preserve
U.S. Department of the Interior:
Antietam National Battlefield
U.S. Department of the Interior:
Bryce Canyon National Park
U.S. Department of the Interior:
Glacier Bay National Park & Preserve
U.S. Department of the Interior:
Bombay Hook National Wildlife Refuge
U.S. Department of the Interior:
Golden Gate National Recreation Area
U.S. Department of the Interior:
Acadia National Park
U.S. Department of the Interior:
Zion National Park
U.S. Department of the Interior:
Great Horned Owl
U.S. Department of the Interior:
Rainbow Mountain Wilderness
U.S. Department of the Interior:
Great Sand Dunes National Park & Preserve
U.S. Department of the Interior:
Headwaters Forest Reserve
U.S. Department of the Interior:
Great Smoky Mountains National Park
U.S. Department of the Interior:
Big Cypress National Preserve
U.S. Department of the Interior:
Petrified Forest National Park
U.S. Department of the Interior:
Independence Hall National Historical Park
U.S. Department of the Interior:
Yellowstone National Park
U.S. Department of the Interior:
Handies Park Wilderness Study Area
U.S. Department of the Interior:
Grand Teton National Park
U.S. Department of the Interior:
Joshua Tree National Park
U.S. Department of the Interior:
New River Gorge National River
U.S. Department of the Interior:
Theodore Roosevelt National Park
U.S. Department of the Interior:
Kenai Fjords National Park
U.S. Department of the Interior:
Korean War Veterans Memorial
U.S. Department of the Interior:
Lewis Clark National Historic Trail
U.S. Department of the Interior:
Moosehorn National Wildlife Refuge
U.S. Department of the Interior:
Indiana Dunes National Park
