Castle Rock - limestone pillar landmark in prairie of western Kansas near Quinter (Gove County) , foggy summer morning - Stock Photo & Image

Castle Rock - limestone pillar landmark in prairie of western Kansas near Quinter (Gove County) , late summer

Bisti/De-Na-Zin Wilderness Area, New Mexico, USA

Castle Rock against sunrise - limestone pillar landmark in prairie of western Kansas near Quinter (Gove County) , late summer morning

Weird sandstone formations created by erosion at Ah-Shi-Sle-Pah Wilderness Study Area in San Juan County near the city of Farmington, New Mexico.

Bisti badlands, De-na-zin wilderness area, New Mexico

Hoodoos, a geologic formation in the badlands near Drumheller - Alberta, Canada

Monument Rocks (Chalk Pyramids) in western Kansas

Hiking rock formation at Castle Rocks in western Kansas

Mount Garfield, dramatic mountain landmark near Grand Junction, Colorado

Monument Rocks (Chalk Pyramids) in western Kansas in fall with some snow patches

Sunset over badlands, Pawnee National Grassland in northern Colorado, typical winter or fall scenery with a dry grass

Clay and sandstone erosion geological formations in Paint Mine Interpretive Park at Calhan near Colorado Springs, Colorado

Hoodoos, clay and sandstone erosion geological formations in Paint Mine Interpretive Park at Calhan near Colorado Springs, Colorado

Natural Fort sculpted from sandstone (Oligocenne White River Formation) by erosion - geologic and historic landmark on Colorado prairie near Wyoming border