The Devil's Holes are a rock ridge and system of karst formations located in the canyon of the Proboynitsa River, a tributary of the Iskar. The area is situated in the Vratsa Balkan and is distinguished by its characteristic rocky structure.
The rock ridge is about a kilometer long and includes numerous cavities, passages, and cave formations. A path passes underneath, allowing for an up-close view of these structures.
Off the beaten path, this site sees fewer visitors and offers a wilder, more authentic experience—perfect for nature lovers and those seeking an adventurous trek.
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