![](http://www.alamy.com/thumbs/6/9FA85155-4741-4C4D-8146-756BE201D316/2B9PJGW.jpg)
The Great Seal Cave near Tyulenovo, Bulgaria, Europe
Size: 5500px × 3667px
Location: Bulgaria
Photo credit: © Diyana Dimitrova / Alamy / Afripics
License: Royalty Free
Model Released: No
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