![Visitors-walking-through-Devetashka-karst-cave,-spectacular-tourist-attraction-in-Bulgaria](https://v7.cdnpk.net/videvo_files/video/partners1986/thumbnails/BB_f1106a79-0c72-4007-ac11-428fe978dd81_small.jpg)
Visitors walking through Devetashka karst cave, spectacular tourist attraction in Bulgaria
1080p 00:58
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