A sliding rock of the Racetrack Playa. The sliding rocks, or sailing stones, move across the mud flats of the Racetrack Playa, leaving trails behind in the mud. The explanation for their movement is not known with certainty, but many believe wind pushes the rocks over wet and perhaps icy mud in winter.
Location: Racetrack Playa, Death Valley National Park, California
Image ID: 25239
Upper Antelope Canyon, a deep, narrow and spectacular slot canyon lying on Navajo Tribal lands near Page, Arizona.
Location: Navajo Tribal Lands, Page, Arizona
Image ID: 35931
Canyon X, a spectacular slot canyon near Page, Arizona. Slot canyons are formed when water and wind erode a cut through a (usually sandstone) mesa, producing a very narrow passage that may be as slim as a few feet and a hundred feet or more in height.
Location: Page, Arizona
Image ID: 36009
Milky Way over Sandstone Fins. Sandstone fins stand on edge. Vertical fractures separate standing plates of sandstone that are eroded into freestanding fins, that may one day further erode into arches.
Location: Arches National Park, Utah
Image ID: 29254
Fire Arch or Windstone Arch, also known as Fire Cave, is a tiny cave with a miniature arch and a group of natural pocket holes. Many people walk by this cave without realizing it is there!.
Location: Valley of Fire State Park, Nevada
Image ID: 26475