Haidushki Dol (Haidouk Gully) is among the most difficult-to-access and most beautiful Rhodopean canyons. The rare black pine trees grow on its vertical white walls, rising hundreds of meters above the turbulent river. The pine trees give a special charm to this fearful place. But the main attraction here is the rock phenomenon, called the Devil's Bridge. It is a rock, linking the two completely vertical slopes of the river.

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