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- Bodies of water 14
- Northwest, Pacific 14
- Postcards 14
- Rivers 14
- Photography 13
- Mountains 8
- Riparian areas 8
- Steamboats 5
- Formations (Geology) 4
- Locks (Hydraulic engineering) 2
- Transportation--Passenger traffic 2
- Agriculture 1
- Boats and boating 1
- Canals 1
- Fishers 1
- Floods 1
- Lighthouses 1
- Oystering 1
- Rafts 1
- Railroads 1