Limestone formations at Natural Bridge Caverns, San Antonio, Texas.

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Photo credit: © Craig Ellenwood / Alamy / Afripics
License: Royalty Free
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Keywords: antonio, bridge, cave, cavern, caverns, destination, eerie, geological, geology, lit, natural, otherworld, otherworldly, rock, san, stalagmite, stalagtite, texas, tourist, travel, underground, unearthly, unusual