Subject
Historic buildings
17
Monasteries
11
Castles & palaces
10
Bridges
9
Streets
9
Rivers
8
Cathedrals
7
Churches
6
Ruins
4
Towers
4
Architecture
3
Harbors
3
Monuments & memorials
3
Abbeys
2
Boats
2
Plazas
2
Railroad stations
2
Railroads
2
Waterfalls
2
Wetlands
2
Estates
1
Hotels
1
Piers & wharves
1
Protestant churches
1