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Subject
- Canyons4
- Cliffs[remove]4
- Rivers3
- Rock formations3
- Rocks3
- National parks & reserves2
- Trees2
- Arkansas River1
- Black Canyon of the Gunnison (Colo.)1
- Black Canyon of the Gunnison National Park (Colo.)1
- Boulders1
- Buildings1
- Buttes1
- Clear Creek (Clear Creek County, Colo.)1
- Clear Creek Canyon (Colo.)1
- Colorado National Monument (Colo.)1
- People1
- Railroad tracks1
- Rapids1
- Roads1