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Subject
- Cliffs[remove]81
- Erosion[remove]81
- Rock formations75
- Buttes57
- Canyons53
- National parks & reserves47
- Grand Canyon (Ariz.)46
- Grand Canyon National Park (Ariz.)46
- Mesas43
- Trees20
- Rivers13
- Hills12
- Valleys12
- Shrubs11
- Colorado River (Colo.-Mexico)10
- Mountains10
- Tree limbs10
- Granite Gorge (Ariz.)8
- Grasses8
- Powell Plateau (Ariz.)7