Subject
- Forests38
- Utility poles33
- Cactus31
- Canyons29
- Tucson Mountains (Ariz.)29
- Sierra Nevada (Calif. and Nev.)28
- Rivers27
- Cities & towns26
- Plains26
- Death Valley (Calif. and Nev.)24
- Coastlines23
- Passes (Landforms)23
- Half Dome (Calif.)22
- Rocky Mountains22
- Boulders21
- Plants21
- Automobiles20
- Cascade Range20
- Deserts20
- Tree limbs20