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- Columbia River Gorge (Or. and Wash.) 7
- Memorials--Oregon 5
- Museums 5
- Visitors' centers--Oregon 5
- Vista House (Or.) 5
- Cliffs 4
- Rivers 3
- Trees 3
- Columbia River Highway (Or.) 2
- Columbia River 2
- Forests and forestry 2
- Landscapes 2
- Riparian areas 2
- Roads 2
- Rocks 2
- Sand bars 2
- Automobiles 1