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Patmos

Ardino, Bulgaria

Patmos (Bulgarian) is a medieval fortress in the Rhodope Mountains of southern Bulgaria rising over a promontory near the confluence of the rivers Arda and Borovitsa. A few kilometers to the west upstream the valley of the Arda are located the ruins of the fortress of Krivus.

Fort data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).

Other forts in Bulgaria