Subject
- Natural areas17
- Roads17
- Museums15
- Coast defenses14
- Cycling14
- Cities and towns13
- Coasts12
- Community gardens12
- Harbors12
- Military architecture12
- Recreation areas12
- Renewable energy sources11
- Sustainable buildings11
- Animals10
- Community centers10
- Environmental conditions10
- Gold mines and mining10
- Outdoor recreation10
- Public art10
- World War (1914-1918)10