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Subject
- Canyons[remove]74
- Cliffs[remove]74
- Rock formations57
- Grand Canyon (Ariz.)55
- National parks & reserves53
- Grand Canyon National Park (Ariz.)52
- Erosion41
- Buttes37
- Mesas37
- Trees29
- Rivers19
- Oak Creek Canyon (Ariz.)16
- Clouds14
- Colorado River (Colo.-Mexico)14
- Mountains13
- Shrubs13
- Valleys11
- Colorado River Valley (Colo.-Mexico)9
- Granite Gorge (Ariz.)9
- Powell Plateau (Ariz.)9