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Subject
- Deserts[remove]242
- Mountains147
- Shrubs136
- Hills77
- Valleys67
- Rocks59
- National parks & reserves54
- Cactus50
- Rock formations48
- Petrified Forest National Park (Ariz.)38
- Death Valley (Calif. and Nev.)37
- Cliffs32
- Trees31
- Saguaro National Park (Ariz.)30
- Mojave Desert (Calif.)29
- Petrified forests27
- Clouds26
- Mesas25
- Painted Desert (Ariz.)22
- Grasses21