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Subject
- Canyons[remove]57
- Cliffs[remove]57
- Rock formations[remove]57
- Grand Canyon (Ariz.)41
- Grand Canyon National Park (Ariz.)40
- National parks & reserves39
- Erosion37
- Mesas31
- Buttes27
- Trees25
- Oak Creek Canyon (Ariz.)15
- Rivers12
- Mountains11
- Clouds9
- Colorado River (Colo.-Mexico)9
- Powell Plateau (Ariz.)9
- Shrubs8
- Valleys8
- Colorado River Valley (Colo.-Mexico)7
- Granite Gorge (Ariz.)7