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Subject
Rock formations
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80
Cliffs
62
Mesas
31
Trees
31
Canyons
29
Chelly, Canyon de (Ariz.)
27
Petrified Forest National Park (Ariz.)
26
National parks & reserves
25
Petrified forests
23
Shrubs
23
Hills
22
Deserts
20
Erosion
15
Buttes
14
Grasses
14
Rocks
14
Spider Rock Overlook (Ariz.)
14
Rivers
12
Blue Mesa (Ariz.)
11
Streams
8