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- Astronomical observatories456
- Landscapes304
- Observatory domes238
- Panoramas191
- Mountains188
- Astronomical instruments160
- Refracting telescopes97
- Snow93
- Portraits78
- Housing51
- Landscape photography51
- Spectrometer38
- Reflecting telescopes37
- Dormitories34
- Astronomical photography33
- Roads30
- Buildings28
- Outbuildings28
- Valleys27
- Fog22