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- Aar River (Switzerland)1
- Abbeys1
- Abutments1
- Acacia1
- Acropolis (Athens, Greece)4
- Adobe buildings1
- Aged persons1
- Agora (Athens, Greece)4
- Agricultural facilities1
- Air travel1
- Aircraft3
- Alamo Square (San Francisco, Calif.)4
- Albergo Excelsior (Florence, Italy)1
- Alcatraz Island (Calif.)3
- Alleys4
- Alpine Zoo (Innsbruck, Austria)1
- Alps, Austrian (Austria)2
- Alps, Swiss (Switzerland)2
- Alta Plaza (San Francisco, Calif.)2
- Angel Island (Calif.)8