Subject
Roads
Bridges
9
Islands
8
Mountains
8
Churches
7
Lakes & ponds
7
Parks
7
Railroads
5
Rivers
5
Bays (bodies of water)
4
Electric railroads
4
Castles & palaces
3
Historic buildings
3
Towers
3
Dwellings
2
Harbors
2
Railroad bridges
2
Villages
2
Architecture
1
Asylums
1
Boats
1
City & town halls
1
Cliffs
1
Courthouses
1
Hotels
1
Lighthouses
1
Monuments & memorials
1
Round Towers
1
Streets
1