Subject
Piers & wharves
Ships
63
Boats
49
Steamboats
41
Harbors
33
Bridges
28
Lakes & ponds
20
Historic buildings
13
Railroads
12
Rivers
10
Capes (Coasts)
7
Hotels
7
Islands
7
Railroad stations
7
Towers
6
Castles & palaces
5
Canals
4
Dwellings
4
Streets
4
Bays (bodies of water)
2
Cathedrals
2
Churches
2
Indigenous peoples
2
Lifeboats
2
Mills
2
Architecture
1
Beaches
1
Electric railroads
1
Emigration & immigration
1
Irish
1
Monuments & memorials
1
Mountains
1
Plazas
1
Universities & colleges
1
Villages
1
Wetlands
1