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Cave city

Cappadocia's "fairy chimneys" formed from compacted volcanic ash hold ancient cave homes, churches, and underground communities.

#CappadociaLandmarks #TurkishArchitecture #VolcanicFormations

© boojedsada / iStock / Getty Images Plus

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A strange set of stones

Ancient volcanic lava flows cooled, forming rock formations. Erosion by wind, rain, and ocean created surreal shapes, now called the Remarkable Rocks.

#RemarkableRocks #AustralianLandscapes #VolcanicFormations

© Christian Handl / Getty Images

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Dawn on a rugged road

A winding road, the Quiraing, on Scotland's Isle of Skye, formed by an ancient landslide, still shifting inches per year, requiring regular repairs.

#QuiraingScotland #IsleOfSkyeLandscapes #VolcanicFormations

© Ben Davis / 500px Prime / Getty Images

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Tuff and stuff

Iceland's Stórurð valley has sunny, green meadows with large tuff boulders, formed by retreating glaciers.

#TuffLandscapes #IcelandicMountains #VolcanicFormations

© Pedro Carrilho / iStock / Getty Images Plus