Lake Proval in city Pyatigorsk, Northern Caucasus, Russia. Lake with turquoise water in a cave. Underground lake Proval or Sinkhole
Lake Proval in city Pyatigorsk, Northern Caucasus, Russia. Lake with turquoise water in a cave. Underground lake Proval or Sinkhole
Size: 5345px × 3000px
Photo credit: © Alex Savin / Alamy / Afripics
License: Royalty Free
Model Released: No
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