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Topic
- Photography 14
- Waterfalls 14
- Northwest, Pacific 10
- Bodies of water 8
- Forests and forestry 6
- Rivers 6
- Bridges 5
- Scenic byways 4
- Tourism 4
- Formations (Geology) 3
- Mountains 3
- Roads--Design and construction 2
- Tunnels 2
- Cliffs 1
- Hiking 1
- Maps 1
- Riparian areas 1
- Volcanoes 1
