Subject
Historic buildings
311
Bridges
213
Churches
192
Streets
157
Castles & palaces
146
Rivers
139
Cathedrals
137
Dwellings
122
Towers
121
Lakes & ponds
116
Harbors
84
Abbeys
74
Monuments & memorials
68
Boats
66
Islands
63
Cliffs
61
Piers & wharves
59
Mountains
58
Architecture
57
Ships
55
Hotels
54
Railroads
50
Universities & colleges
50
Waterfalls
49
Round Towers
41
Crosses
40
Plazas
39
Monasteries
38
Parks
35
Bays (bodies of water)
34
Roads
33
Beaches
31
Capes (Coasts)
31
Protestant churches
28
Ruins
28
Valleys
25
Railroad stations
21
Schools
20
Cemeteries
16
Villages
16
Courthouses
15
Steamboats
15
Canals
14
Causeways
12
Catholic churches
11
Caves
11
Gardens
11
Tombs & sepulchral monuments
10
Walkways
9
Meadows
8
more ...