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Waves of stone

Antelope Canyon's gentle ripples resemble waves. Formed by red-tinged sandstone erosion, this Arizona slot canyon is still shaped by occasional water flow.

#AntelopeCanyon #NavajoNation #RedRockFormations

© JDay Photography / 500px / Getty Images

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Ridges of red

Rust-red cliffs in Utah's Capitol Reef National Park, named for treacherous terrain and stately stone domes.

#UtahLandscapes #RedRockFormations #GeologicalWonders

© Scott Smith / Corbis Documentary / Getty Images

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Sardinian seaside

A long, wide stretch of soft white Sardinian sand meets a line of red, furrowed porphyry rocks stretching into the Mediterranean Sea.

#SardinianCoast #RedRockFormations #MediterraneanGeology

© Pilat666 / iStock / Getty Images Plus