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- Bodies of water 4
- Photography 4
- Railroads 4
- Rivers 4
- Northwest, Pacific 3
- Riparian areas 3
- Formations (Geology) 2
- Mountains 2
- Boatbuilding 1
- Boats and boating 1
- Canada, Western 1
- Canals 1
- Cartography 1
- Dams--Surveying 1
- Discoveries in geography 1
- Discovery and exploration 1
- Eddies 1
- Explorers 1
- Hunting 1
- Inland navigation 1