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- Observatory domes[remove]260
- Astronomical observatories244
- Landscapes170
- Mountains133
- Panoramas128
- Snow65
- Housing31
- Dormitories27
- Buildings21
- Landscape photography10
- Outbuildings9
- Reflecting telescopes9
- Observatories8
- Automobiles6
- Models and modelmaking5
- Refracting telescopes5
- Valleys5
- Astronomical instruments4
- Horses4
- Carriages and carts3