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Subject
- National parks & reserves[remove]23
- Trees11
- Cliffs10
- Mountains10
- Rock formations8
- Shrubs8
- Canyons7
- Rocks5
- Zion National Park (Utah)5
- Clouds4
- Yosemite National Park (Calif.)4
- Buttes3
- Grand Canyon (Ariz.)3
- Shadows3
- Deserts2
- Grand Canyon National Park (Ariz.)2
- Hills2
- Mesas2
- Petrified Forest National Park (Ariz.)2
- Petrified forests2