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                  Перекопський вал
                  Перекопський вал
                  Powerful earthwork, crossing Perekop isthmus at the narrowest part. The height of the shaft was 10 meters, he passed along the channel connecting the Gulf to Lake Perekop Sywash. The exact date of construction is unknown, but in 1. in the Greek sources mentioned Tafros fortress with defensive wall and laid it along the channel. During the Crimean Khanate Perekop defended the Crimea with the mainland. Earthen embankment was reinforced with stone towers, the ruins of one of them, and now at 15 yards rise above the waters of the Gulf Karkinit Black Sea on the west side of the shaft. In the center Turkish fortress Op-Kapu, on which now there were only walls.