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Subject
- National parks & reserves[remove]67
- Cliffs48
- Mountains44
- Rock formations34
- Canyons32
- Trees25
- Colorado National Monument (Colo.)24
- Black Canyon of the Gunnison (Colo.)23
- Black Canyon of the Gunnison National Park (Colo.)23
- Shrubs22
- Rivers18
- Mesas17
- Rocky Mountain National Park (Colo.)16
- Rocky Mountains16
- Rocks15
- Forests14
- Valleys13
- Buttes10
- Clouds10
- Roads9