![](http://www.alamy.com/thumbs/6/EC48C1D0-0B90-4F64-B03C-F3BD34ECA474/2B9PJM0.jpg)
The Great Seal Cave near Tyulenovo, Bulgaria, Europe
Size: 7500px × 2582px
Location: Bulgaria
Photo credit: © Diyana Dimitrova / Alamy / Afripics
License: Royalty Free
Model Released: No
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