Subject
Roads
Lakes & ponds
6
Mountains
6
Bridges
5
Rivers
5
Railroads
4
Castles & palaces
3
Historic buildings
3
Churches
2
Dwellings
2
Harbors
2
Railroad bridges
2
Towers
2
Architecture
1
Asylums
1
Bays (bodies of water)
1
Boats
1
Cliffs
1
Courthouses
1
Hotels
1
Islands
1
Monuments & memorials
1
Round Towers
1