Subject
Bridges
13
Rivers
12
Harbors
11
Historic buildings
10
Ships
10
Piers & wharves
9
Schools
8
Railroads
7
Cathedrals
6
Churches
6
Castles & palaces
4
Railroad stations
4
Beaches
3
Railroad bridges
3
Streets
3
Boats
2
Courthouses
2
Dwellings
2
Roads
2
Round Towers
2
Ruins
2
Towers
2
Villages
2
Bays (bodies of water)
1
Capes (Coasts)
1
Catholic churches
1
Cliffs
1
Monuments & memorials
1
Mountains
1
Steamboats
1
Tombs & sepulchral monuments
1