Subject
Rivers
Bridges
86
Historic buildings
18
Churches
15
Castles & palaces
14
Mountains
13
Lakes & ponds
12
Railroads
11
Waterfalls
11
Piers & wharves
10
Valleys
9
Abbeys
7
Dwellings
7
Ships
7
Boats
5
Roads
5
Canals
4
Harbors
4
Towers
4
Universities & colleges
4
Cathedrals
3
Plazas
3
Railroad bridges
3
Steamboats
3
Convents
2
Meadows
2
Streets
2
Bays (bodies of water)
1
Catholic churches
1
Hospitals
1
Islands
1
Mills
1