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- Gorges 18
- Rivers 11
- Cliffs 4
- Rivers--Oregon 4
- Waterfalls 4
- Bridges 2
- Buildings 2
- Forests and forestry 2
- Nature 2
- Bodies of water 1
- Canyons 1
- Columbia River Valley 1
- Columbia River Watershed 1
- Columbia River 1
- Formations (Geology) 1
- Landforms 1
- Landscapes 1
- Northwest, Pacific 1
- Photography 1
- Rocks 1